Server has 8 tools with inconsistent quality. Four arithmetic tools (add, subtract, multiply, divide) have minimal but present descriptions and valid schemas. The divide tool includes error handling for division by zero. However, the remaining four tools (calculator, list_github_prs, rag_tool, get_stock_price) have poor descriptions that lack context for LLM selection, and their schemas are either partially incomplete or lack parameter descriptions. No output schemas are documented anywhere. Tool naming is generally acceptable (verb-noun convention) but descriptions are frequently too terse to guide LLM reasoning about when to use each tool. The rag_tool description mentions 'Always include the thread_id' but doesn't explain what a thread_id is or how to obtain it. Overall, this server shows incomplete adherence to Arcade's definition quality patterns.

• Add explicit output schemas for all 8 tools. For example: divide() returns {"result": float, "operation": string}. For list_github_prs(), return an array of {"pr_number": int, "title": string, "state": string, "url": string} with a total_count field.
• Expand tool descriptions to 100-150 characters, including WHEN to use the tool and WHAT it returns. Example: 'Divide two numbers. Returns the quotient as a float. Raises an error if divisor is zero. Use this for simple division; use calculator() for multi-operation expressions.' (cf. pattern:tool-description baseline: 194 chars average).
• Rename 'rag_tool' to a more specific verb-noun pair such as 'search_document' or 'retrieve_from_pdf' and update its description to explain: (1) what documents are available, (2) that thread_id must first be created by ingesting a PDF, (3) the format of the response (e.g., list of chunks with confidence scores).
• Document rag_tool's thread_id parameter: 'Thread identifier created when a PDF is ingested. Call ingest_pdf() first, then use the returned thread_id here. If thread_id does not exist, this tool returns an empty result.'
• Add parameter descriptions for calculator's 'operation' field. Change from '{"type": "string", "description": "arithmetic operation: add, sub, mul, or div"}' to include enum constraint: '{"type": "string", "enum": ["add", "sub", "mul", "div"], "description": "arithmetic operation to perform. Use this tool for sequences of operations; use add(), subtract(), multiply(), or divide() for single operations."}'.