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

Annotations already declare destructiveHint=true, idempotentHint=false, and readOnlyHint=false, so the mutation/state-change profile is covered structurally. The description adds the anchoring concept (passage/drawing/document) but does not explain what resolve/reopen alter, permission requirements, or that retries replay via operation_id (which lives only in the schema). Adds modest value beyond annotations, no contradiction.

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?

A single well-formed sentence with the action verbs front-loaded and no wasted filler. It is dense but appropriately sized for the tool's scope; it could trade a few words for the missing routing/parameter context, but as written it is efficient.

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?

An output schema exists, so return values need no explanation, and annotations cover the safety profile. Still, for an 11-parameter tool the description omits how the required document/operation_id and the optional thread_id/recipient relate to the create vs reply vs resolve actions, leaving meaningful gaps.

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 low (36%), so the description is expected to compensate. It usefully glosses the action enum (create/reply/resolve/reopen) and the anchor enum (passage/drawing/document), but leaves 9 other parameters – text, agent, recipient, thread_id, object_id, editorKey, context_handle, and the required document – with no natural-language explanation.

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 specific verbs (creates, replies to, resolves, reopens) and a clear resource (a discussion/comment) plus its scope (anchored to a passage, drawing object, or whole document). An agent can map the four actions onto the action enum. It does not, however, name the sibling that handles reading comments (document.list_comments), so sibling differentiation is only implied.

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 enumerates the actions but never states when to choose this tool over alternatives such as document.list_comments for reading threads, nor any preconditions or exclusions. Usage context is left entirely to inference from the action names.

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