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

Annotations already declare readOnlyHint=true and openWorldHint=false, so safety and scope are partly covered. The description adds useful behavioral context by stating the return fields (id, title, url) and the follow-up fetch step, though it omits result count, ranking, and pagination behavior.

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 two tightly written sentences. The purpose is front-loaded and the return/follow-up information is included without unnecessary repetition or verbosity.

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 simple read-only search tool with a fully described single parameter and annotation coverage, the description is nearly complete: it explains what is searched, what is returned, and how to read a result. It could be stronger if it explicitly routed the agent relative to list_money_calculators or answer_money_question.

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% for the single query parameter, and the schema itself provides examples such as 'coast fire' and '401k match'. The description does not add query syntax or formatting semantics beyond what the schema already supplies, so the baseline score applies.

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 verb and resource: it searches Compound Mint calculators and personal finance guides. This is clear enough for an agent to understand the tool's purpose, but it does not explicitly differentiate itself from siblings like list_money_calculators or answer_money_question.

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 description implies query-based lookup and tells the agent to read a result with fetch. However, it does not state when to use search instead of list_money_calculators or answer_money_question, and it gives no exclusions or alternative-selection guidance.

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