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

With no annotations, the description carries the full burden and only discloses one behavior: the body is discarded. It does not explain the return contract, what is actually checked, whether network or disk access occurs, or what happens when no parameter is supplied. The phrase 'control-word count' implies a number, but the behavior is mostly unexplained.

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 one-line fragment is short and front-loaded, but it is under-specified rather than efficiently concise. It is not a complete sentence, and for a tool with nine optional parameters and no output schema, the brevity omits structurally necessary usage and return information.

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?

The tool has nine optional parameters, no required parameters, no output schema, no annotations, and a one-line description. An agent cannot determine the actual input contract, the output shape, or how 'TeX control-word count' maps to parameters such as ref, city, feed, or json. This is not sufficient to invoke the tool correctly.

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 coverage is 100% and each parameter has a descriptive note, so the description does not need to restate them. However, the description provides no guidance on which of the nine properties is the TeX input or how any of them relate to the count, so it adds nothing beyond the schema. This is the baseline 3 for fully covered schemas.

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 names a concrete operation and resource — counting TeX control words — and is not a tautology. However, it never reconciles that purpose with the nine unrelated optional parameters, and it does not clarify whether the tool validates TeX, returns a count, or emits an OK status. An agent can guess the domain but not the precise function.

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?

There is no when-to-use guidance, no exclusion of sibling validators like file-path-ok or browser-url-ok, and no indication which of the nine optional parameters should be supplied. The only implicit hint is the word TeX, which is insufficient for tool selection among many shape-check siblings.

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