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

The annotations already declare readOnlyHint, idempotentHint, non-destructive, and closed-world behavior, so the safety profile needs no restatement. The description adds value beyond the annotations by disclosing what the response contains: the editorial description and the public /place URL. It does not say what happens if the slug is unknown.

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?

A single sentence with zero filler. The resource and the lookup key come first, followed by what the response contains, so nothing is buried.

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 no output schema and a one-parameter read-only tool, the description does enough: it names the record type and two concrete response fields. The only gap is error and empty-result behavior, which is minor for a simple lookup.

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%, and the single parameter carries its own example ('lytte-coffee'). The description's phrase 'by slug' only reinforces the schema and adds no format, casing, or edge-case detail. Baseline 3 applies when the schema does the work.

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 uses a specific verb-plus-resource formula: 'Full editorial record for one Notting Hill place by slug.' This tells an agent that the tool fetches a single record, which sets it apart from the list_places and search_places siblings. It stops short of naming those siblings as alternatives.

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?

Usage is only implied: the agent is expected to know a slug and want the full record rather than a search. There is no explicit statement such as 'use this after search_places returns a slug' and no statement of when not to use it. It is adequate but lacks routing guidance.

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