count_words

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

No annotations and no behavioral details in description (e.g., what constitutes a word, handling of edge cases, output format). The description carries full burden but fails to disclose traits.

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?

Description is short but lacks substance; it is not verbose but misses opportunities to provide value in the same space.

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 presence of many sibling tools and a simple input schema, the description is too minimal to fully inform usage. No mention of output schema or return values.

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 0% and description provides no additional meaning for the 'text' parameter beyond its name. No clarification on expected input format or constraints.

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?

Description clearly states 'Count words in text,' specifying a concrete verb and resource. This distinguishes it from sibling tools (e.g., count_sentences, count_syllables).

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 on when to use this tool over alternatives like count_sentences or other text statistics tools. Lacks context on prerequisites or exclusions.

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