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

Annotations already flag destructive/irreversible, and the description adds context they cannot carry: Eventee returns success even when no such registration exists, and omitting confirm yields a preview with nothing deleted. Those are non-obvious failure and gating semantics that materially change how an agent should interpret the response.

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?

Front-loaded with 'WRITE, IRREVERSIBLE' and then the confirm gate, in a compact single passage with no filler. The trailing REST endpoint is mildly redundant but harmless context.

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 no output schema and a destructive operation, the description covers everything an agent needs: irreversibility, the confirm precondition, what a non-confirmed call returns, and the misleading-success behavior. Nothing essential is missing.

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 100% and both parameters are already documented in the schema, including the confirm gate. The description restates the confirm behavior and identifies email as the deletion key but adds no format, lookup, or matching semantics beyond the schema, 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 scoped by an identifier: 'delete the registration with this email'. That cleanly separates it from siblings such as eventee_remove_attendee, eventee_list_registrations and eventee_register_people, which operate on attendees or lists rather than a single registration.

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?

It spells out the precondition that selects real deletion versus a no-op preview ('Needs confirm: true... without it: a preview, nothing deleted'), which is exactly the guidance an agent needs before calling. It stops short of pointing to an alternative (e.g. list_registrations to find the email), so it is clear context but not full when/when-not routing.

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