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

The annotations already declare readOnlyHint=false, destructiveHint=true, idempotentHint=true and openWorldHint=false, so the safety profile is covered. The description does add genuinely useful auth context by naming the required 'project_team_members:write' scope, but it says nothing about whether the update is partial or full-replace, nor what happens to fields omitted from the payload.

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 with no filler, and the action plus identifier are front-loaded before the permission requirement. It is lean to the point of being thin for an 8-parameter mutation, but nothing is wasted.

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?

The auth requirement is a valuable addition and no output schema exists, so return values need not be explained. However, for an 8-parameter, destructive-flagged mutation, the description omits update semantics (partial vs. full), which is the main thing an agent needs before calling it correctly.

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% across all 8 parameters, so the schema fully documents role, user_id, dates, is_active and responsibilities. The description adds only the fact that 'id' is the lookup key, which the schema already conveys, so this is baseline.

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 specific verb and resource ('Update a project team member') and names the identifier ('by ID'), so the action is unambiguous. It does not distinguish itself from the many sibling update_* tools beyond the resource name, which is enough here since the resource is unique.

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?

There is no guidance on when to use this tool versus alternatives such as bulk_update, create_project_team_member, or delete_project_team_member. Usage is only implied by the word 'Update' and the existing member ID.

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