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

Annotations already declare readOnlyHint=true, idempotentHint=true and destructiveHint=false, so the '(read-only)' tag in the description earns no credit. The genuinely additive context is behavioral shape: items are ranked by editorial score and venues are resolved to ids plus page URLs, which tells the agent what it is getting. It does not disclose the did_you_mean failure path or the keyed/unkeyed limit difference.

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?

It is front-loaded with the selection trigger and examples before the functional definition, and nothing is padding. The middle sentence 'Signature dishes of a city and where to eat them' largely restates the title, a minor redundancy.

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?

With an output schema present, the description does not need to enumerate return fields, and it still usefully notes ranking and venue-id resolution. Combined with full annotation coverage and fully documented parameters, an agent has everything needed to select and call this 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 description coverage is 100%, so city, limit, query and country are all documented in the schema with formats, defaults and the did_you_mean behavior. The description adds no parameter-level meaning beyond that, so the baseline 3 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 resource and scope: 'Signature dishes of a city and where to eat them,' which is far more precise than a generic search. It never names a sibling (e.g. search_places, things_to_do) to draw the boundary, so it is clear but not sibling-differentiated.

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?

It gives explicit trigger phrasing plus three concrete user-utterance examples ('what should I eat in Naples?', 'where to get pastel de nata in Lisbon', 'local dishes in Hanoi') that make the intended invocation context unambiguous. It offers no exclusions or named alternative tool for overlapping cases, so it stops short of a 5.

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