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

Annotations already flag it as destructive, idempotent, and open-world; the description adds real context beyond that: the confirmation requirement, the full-access precondition, and the fact that link access is view-only. It leaves one meaningful gap for a destructive permission change — what happens to existing collaborators when switching to restricted or team.

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?

Five tight sentences, front-loaded with the action and its confirmation gate, followed by preconditions, caveats, and the identifier rule. No filler and no repetition of obvious information.

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 destructive permission-mutation tool the description covers preconditions, valid states, and identifier selection, and the output schema handles return values. The remaining gap is the effect on pre-existing collaborators/permissions when the access level changes.

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?

At 67% schema coverage the schema's pairwise 'OR' notes don't establish the cross-group rule, so the description's 'Pass exactly one of list_id, list_name, view_id, or view_name' is genuinely additive. The access enum values are also explained in prose, though the 'role' enum (full_access/edit/comment/view) gets no treatment anywhere.

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 opens with a specific verb and resource ('set a List or View') plus the exact enumeration of target states (restricted, Team-visible, anyone-with-link). It distinguishes this tool from content-editing siblings like update_list/update_view by framing it as access configuration, and explicitly disclaims invitation/collaborator-grant behavior.

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 a clear precondition ('After user confirmation', 'Requires full access') and states a valid-usage constraint ('Team access only works on a Team-owned List or View'). What's missing is an explicit pointer to alternatives — e.g. that collaborator grants are handled elsewhere rather than merely saying it doesn't do them.

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