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

No annotations are present, so the description carries full responsibility. It discloses that the query is discarded, but says nothing about the other parameters (whether they are used, ignored, or also discarded). It also omits any mention of return value, side effects, or prerequisites. This is minimal disclosure for a tool with 9 parameters.

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 extremely short, which could be seen as concise, but it is under-specified for the tool's complexity. With 9 parameters and no output schema, a one-sentence description is not appropriately sized. It lacks essential structure to guide an agent effectively.

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 no annotations, no output schema, and a large parameter set, the description is grossly incomplete. It does not explain the role of the other 8 parameters, what the tool returns, or how it differs from siblings. An agent cannot safely call this tool correctly without additional context.

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%, so the schema already documents each parameter. The description adds no new meaning about parameters; it merely restates the query's purpose. Baseline 3 is appropriate because the schema handles the documentation, but the description does not compensate for the tool's apparent single-purpose nature among many parameters.

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 states a specific action (count characters) and resource (search query), but it does not differentiate from sibling tools like memory-key-count or hn-front-count. It also fails to clarify that only the 'query' parameter is used, leaving ambiguity about the other 8 parameters.

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. There is no mention of conditions, exclusions, or comparisons to similar tools. The agent is left to infer usage from the name alone.

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