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Official agent skill

Signals Scout MCP Tool Calls

by PostHog in PostHog/posthog

Signals scout for PostHog MCP tool calls. An agent skill from PostHog/posthog.

OfficialCustom licenceAuto-check passedAgent Workflows

Install Signals Scout MCP Tool Calls

skills CLI
$ npx skills add PostHog/posthog --skill signals-scout-mcp-tool-calls -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install PostHog/posthog signals-scout-mcp-tool-calls --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/PostHog/posthog.git skills-src && mkdir -p .claude/skills && cp -r skills-src/products/signals/skills/signals-scout-mcp-tool-calls .claude/skills/signals-scout-mcp-tool-calls && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
signals-scout-mcp-tool-calls
GitHub stars
40k
Token cost
~8.3k tokens
SKILL.md length
4,220 words
Files
4 (incl. references)
Skills in repo
254
Repo updated
First seen
Licence
Custom licence

At a glance

Signals scout for PostHog MCP tool calls. An agent skill from PostHog/posthog.

  • Works in 6 steps: Failures — a high $mcp_is_error rate… → Struggle — agents call it repeatedly… → Slowness — high p95 $mcp_duration_ms… → …
  • Tasks that involve MCP servers
  • SKILL.md covers The data + reliability tiers…, Quick close-out: is MCP even…, Orient and Field-coverage probe, plus 10 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Signals Scout MCP Tool Calls is an agent skill from PostHog/posthog, published by the product's own GitHub organization. Signals scout for PostHog MCP tool calls. Watches $mcptoolcall telemetry for tools that need improvement — broad-reach failure rates, retry hammering, slow or context-bloating responses — grouped by owning product category, each with a fix suggestion.

Its SKILL.md is about 8.3k tokens, which your agent loads only when the skill is triggered. The skill folder holds 4 other files, including reference files (for example `references/metrics-dashboard.md`, `references/queries.md` and `references/structured-output.schema.json`). Compatibility notes: PostHog Signals agent (Claude sandbox). Read-only analytics + signalscoutinternal:write (scratchpad) + signalscoutreport:write (report channel), plus…

It sits in Agent Workflows, covering MCP servers. It works with PostHog. The repository describes itself as: :hedgehog: PostHog is the leading platform for building self-driving products. Our developer tools – AI observability, analytics, session replay, flags, experiments, error…

When your agent uses it

  • Tasks that involve MCP servers

Example prompts

  • “Use the signals-scout-mcp-tool-calls skill to signal scout for PostHog MCP tool calls. An agent skill from PostHog/posthog”
  • “/signals-scout-mcp-tool-calls”

Requirements

  • Compatibility (from SKILL.md): PostHog Signals agent (Claude sandbox). Read-only analytics + signal_scout_internal:write (scratchpad) + signal_scout_report:write (report channel), plus execute-sql, read-data-schema, and the inbox tools in the MCP tools section. The SQL cookbook lives in references/queries.md and the dashboard recipe for the recorded metrics in references/metrics-dashboard.md (read both on demand); deep-dives into posthog:exploring-mcp-tool-quality and posthog:querying-posthog-data.

Workflow steps

6 steps, taken from the first numbered list in SKILL.md.

  1. Failures — a high $mcp_is_error rate over meaningful volume and reach.
  2. Struggle — agents call it repeatedly within a session, or fail-then-retry it, which almost always means a confusing schema/description…
  3. Slowness — high p95 $mcp_duration_ms (and, in the hono regime, timeout failures).
  4. Context bloat — oversized responses (hono regime only).
  5. Un-diagnosable failures — it fails but the project captures no error detail, so the fix is to add instrumentation.
  6. Over-calling — agents call it in a much larger share of sessions than in the prior window, even when every call succeeds (lens 10).

What it can do on your machine

Read from SKILL.md and the folder at commit c012c8d. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

  • Compatibility

    PostHog Signals agent (Claude sandbox). Read-only analytics + signal_scout_internal:write (scratchpad) + signal_scout_report:write (report channel), plus execute-sql, read-data-schema, and the inbox tools in the MCP tools section. The SQL cookbook lives in references/queries.md and the dashboard recipe for the recorded metrics in references/metrics-dashboard.md (read both on demand); deep-dives into posthog:exploring-mcp-tool-quality and posthog:querying-posthog-data.

    From compatibility in the SKILL.md frontmatter.

Context cost

Signals Scout MCP Tool Calls loads about 8.3k tokens when it runs, and up to ~20k if it reads all its reference files. Until then it costs about 71 tokens; SKILL.md has 4,220 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~71
When it runs · the whole SKILL.md, loaded when a task matches
~8.3k
With references · SKILL.md plus every file in references/, read only if the agent opens them
~20k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 4,220 words (~8,301 tokens).

“You are a focused MCP tool-quality scout. Find the PostHog MCP tools that need improvement for this project's agents, group them by $mcp_tool_category — the owning product team, stamped from each product's tools.yaml — and file one report per category…”

— opening of SKILL.md by PostHog, Custom licence
name
signals-scout-mcp-tool-calls
compatibility
PostHog Signals agent (Claude sandbox). Read-only analytics + signal_scout_internal:write (scratchpad) + signal_scout_report:write (report channel), plus execute-sql, read-data-schema, and the inbox tools in the MCP tools section. The SQL cookbook lives in references/queries.md and the dashboard recipe for the recorded metrics in references/metrics-dashboard.md (read both on demand); deep-dives into posthog:exploring-mcp-tool-quality and posthog:querying-posthog-data.
scout-display-name
MCP tool calls
scout-structured-output-schema
references/structured-output.schema.json
metadata.owner_team
signals
metadata.scope
mcp_analytics

Read the full SKILL.md on GitHub

Files

SKILL.md and 3 other files (references) in products/signals/skills/signals-scout-mcp-tool-calls of PostHog/posthog.

  • SKILL.md
  • references/metrics-dashboard.md
  • references/queries.md
  • references/structured-output.schema.json

Open the folder on GitHubat commit c012c8d

Used in 1 other repository

We found 1 copy of this SKILL.md (exact, near-identical or edited) in other folders. This page covers the copy in PostHog/posthog, which our catalogue first saw on October 8, 2026.

Compare with similar skills

Signals Scout MCP Tool Calls next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Signals Scout MCP Tool Calls compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Signals Scout MCP Tool Calls this skillPostHog/posthog40k—~8.3kAutomated safety check: PassCustom licence
Exploring The WizardPostHog/wizard197—~2.2kAutomated safety check: PassMIT
MCP Server Builderanthropics/skills180k63 repos~2.3kAutomated safety check: PassApache-2.0
MCP Server BuildershareAI-lab/learn-claude-code78k4 repos~1.2kAutomated safety check: PassMIT
MCP Integration for Pluginsanthropics/claude-plugins-official38k11 repos~3.1kAutomated safety check: PassApache-2.0
Microsoft Skill CreatorMicrosoftDocs/mcp1.9k3 repos~2.1kAutomated safety check: PassCC-BY-4.0

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Works with

Categories

Questions about Signals Scout MCP Tool Calls

What does Signals Scout MCP Tool Calls do?

Signals scout for PostHog MCP tool calls. An agent skill from PostHog/posthog. Signals Scout MCP Tool Calls is an agent skill from PostHog/posthog, published by the product's own GitHub organization. Signals scout for PostHog MCP tool calls.

When should I use Signals Scout MCP Tool Calls?

Signals Scout MCP Tool Calls fits situations like: tasks that involve MCP servers.

How do I install Signals Scout MCP Tool Calls in Claude Code?

Run `npx skills add PostHog/posthog --skill signals-scout-mcp-tool-calls -a claude-code`. Or copy the skill folder (products/signals/skills/signals-scout-mcp-tool-calls in PostHog/posthog) into .claude/skills/signals-scout-mcp-tool-calls in your project. Claude Code loads it when a task matches its description.

How do I install Signals Scout MCP Tool Calls in Codex?

Run `npx skills add PostHog/posthog --skill signals-scout-mcp-tool-calls -a codex`. Or copy the skill folder (products/signals/skills/signals-scout-mcp-tool-calls in PostHog/posthog) into .agents/skills/signals-scout-mcp-tool-calls in your project. Codex loads it when a task matches its description.

Can I use Signals Scout MCP Tool Calls in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add PostHog/posthog --skill signals-scout-mcp-tool-calls -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/signals-scout-mcp-tool-calls, .gemini/skills/signals-scout-mcp-tool-calls, .github/skills/signals-scout-mcp-tool-calls and .opencode/skills/signals-scout-mcp-tool-calls in your project.

What does Signals Scout MCP Tool Calls need to run?

SKILL.md names no scripts, command-line tools or credentials: Signals Scout MCP Tool Calls is instructions for the agent only. Compatibility (from SKILL.md): PostHog Signals agent (Claude sandbox). Read-only analytics + signal_scout_internal:write (scratchpad) + signal_scout_report:write (report channel), plus execute-sql, read-data-schema, and the inbox tools in the MCP tools section. The SQL cookbook lives in references/queries.md and the dashboard recipe for the recorded metrics in references/metrics-dashboard.md (read both on demand); deep-dives into posthog:exploring-mcp-tool-quality and posthog:querying-posthog-data. .

Does Signals Scout MCP Tool Calls access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Signals Scout MCP Tool Calls safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Signals Scout MCP Tool Calls use?

Signals Scout MCP Tool Calls has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.

How many tokens does Signals Scout MCP Tool Calls use?

About 8.3k tokens (SKILL.md is roughly 33k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 12k tokens, read only when the agent opens those files.

What are the alternatives to Signals Scout MCP Tool Calls?

Skills that share tags, products or a category with Signals Scout MCP Tool Calls: Exploring The Wizard (PostHog/wizard, 197 stars), MCP Server Builder (anthropics/skills, 180k stars), MCP Server Builder (shareAI-lab/learn-claude-code, 78k stars) and MCP Integration for Plugins (anthropics/claude-plugins-official, 38k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Signals Scout MCP Tool Calls?

PostHog (a GitHub organization, an official publisher) maintains it in PostHog/posthog, which has 40,209 GitHub stars. The repository holds 254 skills in this directory. The repository was last updated on October 10, 2026.

Source: PostHog/posthog on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.