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

No annotations, so the description carries full burden. It discloses one genuinely non-obvious trait: the returned session token is adopted automatically and all later calls run as that user. However, it says nothing about side effects of register (creates an account) or whether updateProfile overwrites fields, which matters for a tool with mutations.

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 sentences, front-loaded with what the tool reads/writes before the auth note and action list. Little waste, though the action enumeration repeats the schema enum.

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 six-action dispatcher with free-form params, no annotations, and no output schema, the description offloads parameter discovery to adgpt_capabilities, which is a reasonable strategy. Still missing per-action behavioral detail and return-value expectations for a tool this complex.

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 50%; the free-form `params` object has no per-action shape in the schema. The description compensates by pointing to adgpt_capabilities with the operationId, but it does not itself describe what params register/login/updateProfile expect. Listing actions merely restates the enum.

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 specific resources it reads (profile, credit balance, in-flight generations) and the update case, then enumerates all six actions (register, login, me, credits, activeGenerations, updateProfile). An agent can identify the tool's scope without opening the schema, though the six-in-one dispatcher nature means no single verb is sharp.

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 explicit sequencing guidance — 'No account yet? Start with register (or login)' — and routes the agent to adgpt_capabilities for per-action parameters. It lacks explicit when-not-this-tool exclusions against the many sibling tools, but the auth-first context is clear.

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