Approve leave

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

With no annotations, the description carries the full burden for behavioral disclosure. It mentions that the tool updates the balance, which is a side effect, but does not specify permissions required, reversibility, error conditions, or behavior for invalid or already-approved leaves.

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 description is a single concise sentence with no fluff, but it is too brief to convey necessary context. The structure is efficient, though the content is minimal and could be expanded to include important details.

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?

Given two required parameters, no output schema, and no annotations, this description is insufficient for a mutation tool. It does not explain the balance update mechanism, expected return values, or any prerequisites, leaving significant gaps for an agent to invoke it correctly.

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 description does not explain the meaning or role of leaveId or studentId. The parameter names are self-explanatory in the schema, but the description adds no semantic value beyond the schema, failing to compensate for the low coverage.

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 clearly states the tool's function: approving a pending leave and updating the balance. It uses a specific verb ('approve') with a resource ('pending leave'), which distinguishes it from sibling tools that list or retrieve student information.

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?

No explicit guidance is provided on when to use this tool versus alternatives, nor are there any prerequisites or exclusions. The description implies usage for approving pending leaves but does not explain when to prefer this over list_students or get_student_details.

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