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

Adds real value beyond annotations by disclosing the 2-credit cost and that the response includes both transformed text and a changed-flag. However, it says nothing about failure modes, unsupported inputs, or length limits, and the readOnlyHint/openWorldHint profile is only implicitly consistent with a text-transformation service.

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?

Two sentences, front-loaded with the core action and followed by the cost note. The opening redundantly restates the title ('Tense Converter: Tense Converter rewrites...'), which wastes a few words, but nothing else is extraneous.

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?

A simple two-parameter tool with an output schema, so return-value detail is not required; the description nonetheless mentions the change flag. Cost is disclosed. Only minor gaps remain around input limits and edge cases, which are low-risk for this tool's complexity.

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%, so the baseline is 3, but the description adds genuine meaning: it constrains the 'tense' parameter to past or future, information the schema leaves open (no enum, only a default and an example). It also frames 'text' as 'any passage,' clarifying expected input size.

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?

States a specific verb and resource ('rewrites text into past or future tense') and names the scope of the transformation. It does not explicitly distinguish itself from near-neighbors like GrammarCheck, TextLemmatizer, or TitleCaseConverter, but the purpose is unambiguous on its own.

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?

Offers invocation guidance ('Submit any passage with your chosen target tense') but no when-to-use versus when-not-to-use guidance and no mention of alternatives among the many text-manipulation siblings. Usage is implied rather than directed.

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