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

Annotations already declare readOnlyHint=false, idempotentHint=false, destructiveHint=false, and openWorldHint=false, so the safety profile is covered. Beyond that the description adds only the REST path; it says nothing about session lifetime, whether calling it twice creates duplicate sessions, auth requirements, or what state the session begins in.

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?

One compact sentence with the action front-loaded and the endpoint appended as a scannable identifier. Nothing is wasted, though the endpoint fragment is of marginal value to an agent that will not call the REST API directly.

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?

This is a state-creating mutation tool with no output schema and no annotations explaining the session model, yet the description gives no hint of the workflow (start -> submit factors -> complete) or what the caller receives back. An agent cannot tell what to do with the result or what is required next.

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%, but the single 'body' parameter is documented only as 'JSON request body. See the AffixIO OpenAPI schema resource for the contract,' which is a pointer rather than semantics. With full nominal coverage the baseline of 3 applies, and the description adds nothing further about the body.

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 ('Start a multifactor gate session') and even names the underlying endpoint, which the sibling 'start' tools (quorum_start) mirror. The verb 'start' cleanly distinguishes it from the companion gate_multifactor_complete/factor/get siblings, though the description does not explicitly articulate that distinction.

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?

There is no when-to-use guidance, no prerequisites, and no mention of the sibling tools (factor, complete) that form the multifactor workflow. The agent must infer that this opens a session that later needs factors submitted via other tools.

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