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

Annotations already declare destructiveHint=true and readOnlyHint=false, so the mutation profile is known. The description adds genuinely new information: an owner-only, sign-in-required authorization constraint. It stops short of saying what happens if the block_id is invalid or whether the removal is reversible/logged, which is the remaining material gap for a destructive tool.

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 with no waste. Authorization and the action are front-loaded, and the parameter-sourcing hint comes last in the natural reading order.

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 single-parameter destructive mutation with annotations covering the safety profile and no output schema, the description supplies the key missing pieces: precondition (owner sign-in), effect, and where to get the ID. Only error/edge-case behavior is absent.

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?

The schema documents block_id only as a bare string at 0% coverage, so the description must compensate. It does add provenance value by telling the agent to obtain block_id from block_time or schedule, but it says nothing about format or validation, so the compensation is partial.

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 a block made with block_time') plus the resulting effect ('customers can book that time again'). It is clearly the inverse of the sibling block_time, so an agent can distinguish them without inspecting schemas.

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?

Gives a clear usage context (undoing a block so the time becomes bookable) and points to the source of the required identifier (block_time or schedule). It does not state explicit exclusions or failure cases, but the when-to-use condition is unambiguous.

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