authenticate

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

The annotations only indicate that this is not read-only and is open-world, but the description adds meaningful behavioral context: it returns a link for a person to open rather than directly authenticating the agent, and it should only be used when no link has already been provided. This clarifies the interactive nature of the operation.

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 deliver the core purpose, the output, and the precise usage condition with no wasted words. The critical 'only if' guidance is placed prominently.

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 one-parameter authentication tool with a helpful schema and clear annotations, the description covers what the tool does, what it returns, and exactly when to invoke it. Nothing essential is missing.

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?

The input schema already provides full coverage for the single parameter, including its meaning and default behavior. The description does not repeat parameter details, but that is acceptable since schema coverage is 100%; the baseline of 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?

The description states a specific verb and resource: 'Sign in to ezQuill.' It also explains the tool's immediate output ('Returns a link for the person to open'), making it clearly distinct from siblings like sign_out and the project-reading tools.

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 gives an explicit condition for when to call the tool: 'Call this only if a tool reports NOT_AUTHENTICATED and no link was already given.' This also states an exclusion, preventing unnecessary repeated calls when a link is already available.

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