Sign in to Audial

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

Annotations declare readOnlyHint=false and openWorldHint=true, but the description adds the key behavior an agent cannot infer: the call opens an approval page and blocks waiting for the user. That blocking-wait trait is essential for planning. It doesn't say what happens on denial or timeout.

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?

Two short sentences, front-loaded with the action and mechanism, then the routing constraint. No filler.

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 annotations, a fully documented single parameter, and an output schema, the description covers the essentials, including the blocking behavior. Only failure modes (denial, timeout, headless environments) are left unaddressed.

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% and switch_account's semantics (sign out first to change or repair the account) are fully documented in the schema. The description adds nothing about the parameter, 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 (sign in to Audial) and adds the distinguishing mechanism: it opens a browser approval page. That separates it from sign_out and account, though the sibling differentiation is not spelled out by name.

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?

'Not needed before other tools: they start the same sign-in when nobody is signed in' is an explicit when-not-to-use statement that routes the agent away from unnecessary calls. It stops short of saying when you *should* call it, e.g. proactively before a long batch of generation work.

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