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

The readOnlyHint annotation already establishes this as a safe read operation, and the description adds a useful size cap ('<=1.5 KB') plus conditional content when a trader is supplied. It does not contradict annotations, but it leaves out other behavioral details such as failure modes or caching.

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 very short and front-loads the rating rule, but the semicolon-linked fragment ('with trader, that trader's check per level, radar and stars history') is cryptic and poorly structured. It avoids verbosity but sacrifices clarity through under-specification.

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?

For a tool with three parameters, no output schema, and only readOnlyHint annotations, the description is too sparse. It names some returned content but does not explain the 'cat' parameter, how 'format' changes output, or enough about the response shape for an agent to call it confidently.

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 only 33%, with 'trader' documented as 'as get_trader' but 'cat' and 'format' undocumented. The description clarifies that 'trader' adds trader-specific output but says nothing about what 'cat' means or how 'format' affects the response, so it does not compensate for the low coverage.

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 identifies the resource as the 1-5★ rating rule and notes that adding a trader returns that trader's per-level check, radar, and stars history. It is understandable despite jargon like 'check per level' and does not explicitly differentiate from sibling tools, but the core purpose is clear.

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?

The only usage-like signal is the conditional phrase 'with trader', which describes an optional parameter effect rather than when to choose this tool over siblings like get_trader or find_traders. No when-to-use or when-not-to-use guidance is given.

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