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

The description claims the tool is 'idempotent on the same space+slot', but the annotations set idempotentHint to false, creating a direct contradiction. This reduces transparency as the agent cannot trust the behavioral claim.

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 paragraph that conveys necessary information without redundancy. Each sentence adds value, but the structure could be improved with bullet points or separate sentences for clarity.

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 tool with 5 required parameters and no output schema, the description covers behavioral details (atomicity, conflict handling, reassignment logic) and required inputs. It fully explains the tool's operation and constraints.

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?

With 0% schema description coverage, the description adds context for all 5 parameters by stating they are required and mentioning ISO format for times. However, it does not individually describe each parameter's role or constraints beyond what is in the schema.

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 specifies the verb 'ASSIGN' and the resource: an approved event to a venue Space and slot. It distinguishes this tool from siblings like unassign_event_from_space by describing the core action of booking/reassignment.

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?

The description provides clear context on when to use the tool (assign/reassign events to a space slot) and notes that overlapping slots in different rooms are acceptable. It implies the tool is for booking, not releasing, but does not explicitly list alternatives.

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