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

Annotations only say it is a non-destructive, non-idempotent, closed-world write. The description adds the critical behavior the annotations cannot express: the call is a staged request that does nothing until a human approves it in Settings > MCP and execute_approved_action is invoked, and that org admins can configure approval requirements while business-workflow approvals always apply. That is substantive, decision-relevant context.

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 approval sentences are front-loaded and earn their place. The opening 'Use this when working with RetailHardHat documents records in the connected organization' is boilerplate that says nothing actionable and should have been replaced by parameter or sibling-routing information.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 gated mutation with a rich output schema already present, the description covers the one thing the agent cannot learn elsewhere: that this is a two-phase approve-then-execute flow. Only the parameter-level semantics are missing, and the output schema/annotations cover the return and safety profile.

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% and the schema is a nested object, so the description carries the full burden. It only conveys that the file must be a previously uploaded object owned by the organization; it never mentions projectId, or the name/filePath/fileSize/fileType/description fields or the required filePath pattern, leaving the agent to reverse-engineer the nested payload from the schema alone.

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 second sentence states a specific verb and resource: attach an uploaded file owned by the organization to a project. It distinguishes from attach_site_document/attach_task_document by implicitly scoping to the project document record, though it never names the sibling family explicitly. The opening sentence about 'RetailHardHat documents records' is vague filler that adds nothing.

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 real precondition (the file must already be uploaded and owned by this org) and states the approval workflow, which implies when to use it. But there is no explicit guidance on when to choose this over the ~10 other attach_* tools or over list_project_documents/read_project_document, so the agent must infer the boundary.

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