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

Going beyond the annotations, it discloses the append-only nature of comments, the idempotency promise, that assignments grant no approval rights, and that notifications are queued subject to access/preferences with no delivery confirmation. It aligns with readOnlyHint=false/idempotentHint=true, though it does not elaborate on the destructiveHint=true annotation or the exact return envelope.

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?

Four dense sentences front-load the core action, then add the revision return contract, permission caveat, and notification semantics in order of importance. Every sentence earns its place; no filler or repeated schema content.

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 complex write tool with no output schema, the description covers idempotency, linking, return-value purpose, an access/permission nuance, and async notification behavior. It stops short of describing result shape or explicitly routing to update/read siblings, but the schema and sibling list fill most of the remaining 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?

With 67% schema description coverage, the description compensates for the undocumented `item` parameter by naming its four kinds and their optional link targets, and by clarifying `idempotencyKey` semantics. `projectId` is already described in the schema, so the description adds value where coverage is weak without repeating everything.

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 ('Add') and explicitly enumerates the resource variants: 'project deadline, assignment, append-only comment or clarification,' plus the optional link targets. This both names the action and differentiates it from the update-oriented sibling (helvabase_update_work_item) by framing creation and a returned revision.

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 intended creation context is clear: add a new work item linked to requirements, draft sections, proof versions, or document-plan items, and receive a revision for later updates. However, it never explicitly names alternatives (e.g., helvabase_update_work_item or helvabase_work_items) or states when not to use this tool, leaving routing to inference.

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