The 'echo' tool is a test/demo tool with minimal production value. Input schema is present but incomplete: {"type":"object"} with no properties defined, violating JSON Schema best practices. Description is trivial (10 chars: 'Test tool that echoes back arguments'), below the 20-char minimum for actionable guidance. No parameter descriptions, no output schema documented, no error handling guidance. Tool serves no real agent use case, it is a placeholder, not a production tool.

• Replace the 'echo' test tool with real domain tools (e.g., if this is a file utility, add tools like 'read_file', 'write_file', 'list_directory' with full schemas and descriptions).
• Expand input schema from {"type":"object"} to include 'properties' with typed, described parameters. Example: {"type":"object", "properties": {"message": {"type":"string", "description": "Text to echo back"}}, "required": ["message"]}.
• Rewrite tool description to 50 - 150 characters explaining what it does, when to use it, and what it returns. Example: 'Echoes back the provided message unchanged. Useful for testing tool invocation and response handling.'
• Document the output schema (e.g., {"type":"object", "properties": {"echoed_message": {"type":"string"}}}) so LLMs know what fields to expect.
• Add error handling guidance: specify which errors are retryable (e.g., timeout) vs. user-fixable (e.g., invalid input), and suggest recovery steps.