Single tool 'execute_skill_action' has a reasonable name starting with verb, but critical gaps undermine quality. Description is 97 chars (below 10-char minimum for actionable guidance). Input schema present but parameters lack type definitions in visible code, only string and array types inferred from description text, not from explicit JSON Schema. No output schema documented. No error handling guidance. Tool appears to perform security analysis but lacks specificity on what 'security_rules' parameter accepts, expected output structure, or failure modes. Code shows only mock implementation returning hardcoded results.

• Add explicit output schema documenting all return fields: critical_issues_found (integer), approval_verdict (enum: APPROVE_MERGE_READY, REQUEST_CHANGES, NEEDS_REVIEW), suggested_fixes (array of strings), and any additional fields like severity_breakdown or affected_files.
• Expand tool description to 150-250 chars explaining: 'Analyzes git diffs for security vulnerabilities and code quality issues. Returns approval verdict and actionable fix suggestions. Use before merging code to catch taint flows, injection risks, and unsafe patterns.'
• Add description to 'security_rules' parameter: 'Optional array of security rule names to enforce (e.g., ["sql_injection", "xss", "hardcoded_secrets"]). If omitted, applies default ruleset. See available rules via list_security_rules tool.'
• Document error cases: 'Returns error if git_diff_content is empty, malformed, or exceeds 1MB. If analysis times out (>30s), returns partial results with timeout flag. Invalid rule names are silently ignored.'
• Add enum constraint to 'approval_verdict' in output schema and document what triggers each verdict (e.g., APPROVE_MERGE_READY = 0 critical issues, REQUEST_CHANGES = 1+ critical issues).