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

Annotations already declare readOnly=false, idempotent=false, destructiveness and open-world, so the safety profile is covered. The description adds the useful behavioral fact that it returns an id to be reused, plus the endpoint. However it doesn't cover error behavior, required permissions, or return-shape detail, so credit is moderate.

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?

Three tight clauses, front-loaded with the WRITE flag, then the action, then the downstream usage. Zero waste and well ordered.

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 simple 2-parameter create tool with no output schema, the description supplies the essential return-value hint (id reuse) and the endpoint. Nothing critical is missing, though a note on permissions or failure modes would round it out.

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%, with both name and order fully documented in the schema including defaults and bounds. The description adds no per-parameter meaning beyond what the schema already provides, so the baseline 3 is appropriate.

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+resource ('add a hall') and clarifies what a hall is (room, stage or virtual space) within an event. A clear 'WRITE:' prefix flags the operation type. It doesn't explicitly distinguish itself from siblings like create_session, but the resource is unambiguous.

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?

'Use the returned id as hall_id for sessions' gives concrete downstream usage, implicitly signalling this is a prerequisite step before creating sessions. Lacks explicit when-not-to-use or alternatives, but the context is clear enough for an agent to know when to call it.

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