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

Annotations already convey destructiveHint=true and readOnlyHint=false, and the description does not contradict them. It adds useful context by requiring an expectedRevision from get_page_sharing, hinting at optimistic concurrency, and by noting that restricted methods are OR alternatives. It does not describe side effects of overwriting existing sharing or behavior on stale revisions, but the annotations cover the core safety profile.

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?

The description is only three sentences with no filler, and each sentence contributes information about access modes, restricted methods, or the revision prerequisite. It is compact and front-loads the main choices, though its brevity contributes to missing parameter detail.

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 mutation tool with a complex three-variant policy and no output schema, this description omits important invocation details like how to identify the page, expiration behavior, and exact restricted-method semantics. The schema and annotations fill some gaps, but the description alone is not complete enough for reliable use.

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?

With 0% schema description coverage, the description must compensate, but it only lightly covers policy modes and the revision source. It does not explain pageId, expiresAt, or the detailed restricted method options such as password, recipients, and emailDomain. The phrase 'restricted methods are OR alternatives' adds some meaning but is too vague to carry the schema's full semantics.

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 the core action via 'Choose owner-only, public, or restricted access,' clearly mapping to the private, public, and restricted policy modes in the schema. The tool name and title reinforce that this sets page sharing, so an agent can identify the purpose. It does not explicitly differentiate itself from sibling tools like get_page_sharing, but the mutation intent is clear.

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 description provides one concrete prerequisite: use the revision returned by get_page_sharing, implying the correct call sequence. It does not explicitly say when to prefer this tool over siblings or when not to use it, leaving usage context mostly implied.

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