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

Annotations already declare readOnly, idempotent, non-destructive, closed-world, so the safety profile is covered. The description adds genuine value by disclosing that MCP approval requirements are admin-configurable and that business workflow approvals always apply — an authorization/approval gate an agent needs to anticipate. It does not mention pagination or result limits.

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, front-loaded with the action and scope. The second sentence earns a place by flagging approval gating, though it reads slightly like boilerplate policy text.

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?

With only one parameter and an output schema present, return values need not be described. The definition covers action, scope, and approval prerequisites; only pagination/depth behavior remains unstated, which is minor.

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 coverage is 0%, so the description must carry the load: it establishes that taskId is the parent task and that it must be 'authorized'. It still adds no detail on UUID format or failure behavior for unauthorized/invalid task IDs.

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?

States a specific verb and resource ('Read direct subtasks') plus a scope qualifier ('direct') that implies one level rather than recursive descent. It is distinguishable from list_tasks, though it never names that sibling explicitly.

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 word 'direct' implicitly defines the boundary of what is returned, which hints at when to use it versus a full task list. However, no alternative (list_tasks, list_task_dependencies, list_task_dependents) is named and no when-not condition is given.

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