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

Annotations already declare readOnlyHint/destructiveHint/idempotentHint, so the bar is low, yet the description adds substantial non-obvious behavior: query relaxation via stemming, hard-coded synonym mapping (tercüme -> Çevirmen), prefix-only matching on relaxed hits, and a deliberate empty result for unrelated queries. It also warns that the reply reports the actually matched word, which affects how an agent should relay results to the user.

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?

Dense but front-loaded: purpose and the id/consumer relationship come first, then the relaxation caveats. Every sentence carries information, though the Turkish-specific example (diş kliniği, tercüme/Çevirmen) makes it longer than strictly necessary for a general agent.

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?

An output schema exists, so return-value documentation is not required, and the description still describes the id/display-name shape. Behavioral edge cases are well covered; the main remaining gap is the undocumented region/language parameters, which an agent must infer from the defaults.

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%, so the schema documents none of the three parameters. The description adds meaning for 'query' (natural-language word in the listing's own language) and indirectly for 'language', but never explains 'region' (default TR) or the language default, so it only partially compensates for the coverage gap.

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 (Searches), resource (Google Business Profile CATEGORIES), input (by name) and output (id plus display name). The agent can immediately distinguish it from keyword/location siblings and knows exactly what it returns.

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?

Explicitly states the downstream use case: 'Use this to find the id needed by gbp_update_location's primary_category / additional_categories,' naming the sibling tool and the exact parameters that consume the output. That is as directive as guidance gets.

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