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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint=false, so the safety profile is covered structurally. The description adds the routing behavior (returns a slug consumed by other tools) and the boundary that it is not for online products or emergencies, which is useful context beyond the annotations, though it says nothing about result count or ambiguity handling.

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?

Front-loaded with the trigger scenario, then the skip-list, then exclusions. The middle sentence enumerating eight slugs is long but each slug earns its place by preventing an unnecessary call; overall it is dense rather than padded.

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 single-parameter, read-only lookup with no output schema, the description covers the trigger, the routing purpose, and the negative boundaries, which is most of what an agent needs. It could state what a match returns (single slug vs ranked list) when the query is ambiguous, but the coverage is otherwise solid.

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 schema already specifies that the query is a task description, not a category name. The description's embedded examples reinforce the expected input style but add no syntax or format detail beyond the schema, so the baseline of 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 precise verb+resource: it converts a user's described in-person local service into Servana's category slug. It explicitly names the downstream consumers (search_vendors, estimate_service_request), so an agent can distinguish it from its siblings without opening any schema.

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 conditions with example utterances, an explicit skip-list of eight known slugs with what each covers, and explicit exclusions (online products, emergencies, medical/legal/financial advice). When-to-use, when-not-to-use, and the alternative path are all present.

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