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

Annotations already declare destructiveHint=true, idempotentHint=true, and readOnlyHint=false, so the safety profile is covered. The description adds the meaningful extra that this requires the project_comments:write scope, which is actionable auth context for a mutating call. It does not say whether the delete is soft or permanent, which keeps it from a 5.

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 compact sentences, with the core action front-loaded and the permission requirement second. No filler, nothing redundant with the title or annotations.

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 delete with rich annotations and no output schema, the description covers what is deleted, how it is identified, and the required scope. The only gap is any statement about permanence or side effects, which the destructiveHint partially covers.

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?

Only one parameter exists and schema description coverage is 100%, so the schema already documents the UUID id fully. The description's 'by ID' adds nothing beyond what the schema provides, matching the baseline 3 for schema-documented parameters.

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 gives a specific verb and resource ('Delete a project comment by ID'), which is unambiguous and lets an agent distinguish it from delete_project, delete_project_update, and delete_project_document by name alone. It does not explicitly contrast itself with those siblings, so it falls short of the 5-level sibling differentiation.

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?

Usage is implied by 'by ID' plus the stated project_comments:write scope prerequisite, which is a genuine precondition. However, there is no guidance on when to prefer this over update_project_comment (edit vs. remove) or any note about irreversible removal.

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