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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is covered. The description adds a genuinely useful behavioral detail the annotations lack - owner-only authorization - but says nothing about failure modes when called by a non-owner or about pagination/volume of recipient emails.

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 short sentences, both load-bearing: the first defines what is returned, the second front-loads the authorization constraint. No filler or restated title content.

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 getter with annotations covering safety and no output schema, the description covers purpose, returned content, and the owner precondition. Only edge-case behavior (non-owner errors, empty recipient list) is unaddressed.

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 0%, but the single 'id' parameter carries a uuid format and pattern in the schema itself. The phrase 'one of your briefs' implicitly identifies the parameter as a brief identifier, adding modest meaning, though no explicit format or sourcing guidance is given in the description.

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 (retrieve) and resource (access settings and allowed recipient emails for a brief), which an agent can distinguish from set_document_sharing. It stops short of naming siblings explicitly, so it is clear but not maximally 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?

The sentence 'Only the owner can read these settings' gives a precondition for use, but there is no guidance on when to call this versus set_document_sharing or get_document. Usage is implied rather than spelled out.

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