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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=true, so the safety profile is covered structurally. The description adds only the endpoint path and the fact that returned permissions are scoped to 'the token user', which is genuine but thin added context; nothing about auth scoping beyond that or how a missing/inaccessible id behaves.

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?

Two compact clauses: the payload first, the endpoint last. Every element earns its place with no filler or repetition of the title.

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 one-parameter read-only getter with no output schema, the description usefully enumerates the returned fields (name, internal id, permissions), which compensates for the absent output schema. Only the error/not-found behavior is left unspecified.

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% and the single parameter already carries its pattern and an explicit pointer to innovint_list_wineries for discovery. The description's 'by id' adds nothing 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?

States a specific verb and resource ('One winery by id') plus the fields returned (name, internal id, permissions), which is well beyond a tautology. It implicitly contrasts with the plural list_wineries, but never names that sibling in the description itself, so it falls just short of the top bar.

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: you call this when you already hold a winery id. There is no explicit 'use when' statement or named alternative in the description (the pointer to innovint_list_wineries lives in the schema, not here), and no preconditions or failure cases are mentioned.

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