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 agent knows this is an irreversible write. The description adds useful context about the consequence (the time becomes bookable again), but does not say whether the removal is permanent, whether it applies only to future periods, what happens with an unknown or already-removed ID, or that the staff_id must still exist.

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 front-loaded sentence with no filler; both the action and its consequence earn their place.

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 two-parameter destructive delete with full schema coverage and a rich annotation set, the description says what it removes and why it matters. The remaining gap is behavioural edge cases (invalid ID, past-dated entries) rather than anything structural.

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 100% and the schema itself already explains that time_off_id comes from add_time_off/list_time_off with 'off-…' or 'block-…' formats. The description adds no parameter-level meaning beyond that, so the baseline 3 applies.

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 ('Remove time off or a blocked period') plus the practical effect ('so the time can be booked again'), which tells an agent exactly what state changes. It is clearly separable from add_time_off and list_time_off by name, though it never explicitly contrasts itself with them.

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 the verb and the object it operates on — an agent would call it to delete a time-off/blocked entry. However, there is no explicit when-to-use guidance, no exclusions (e.g. past vs. future entries), and no mention of using list_time_off first to obtain the ID.

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