ping

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare readOnlyHint=true and idempotentHint=true, so the tool is safe. The description 'Echo' adds no new behavioral details and does not contradict annotations. It fails to add value beyond what annotations provide.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is one word, making it very concise. For a trivial tool, this level of brevity may be sufficient, but it could be slightly more informative. Nonetheless, it does not waste words.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the tool's simplicity, low parameter count, and presence of annotations indicating safe operation, the single-word description is nearly complete. The output is implied as the echoed message. No output schema is needed. The description adequately conveys the tool's function.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100% and the parameter 'prompt' is described as 'Message to echo'. The description 'Echo' adds no extra semantic meaning. Baseline score of 3 is appropriate as schema already documents the parameter sufficiently.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description 'Echo' indicates the tool returns the input, which is clear but minimal. It does not fully distinguish from sibling tools like 'timeout-test' or 'fetch-chunk', but the name 'ping' already implies a simple echo or test. The purpose is adequate but not highly specific.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance is provided on when to use this tool versus alternatives like 'timeout-test' or 'do-act'. The description lacks context for choosing this tool over others.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.