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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is covered. The description goes beyond that by disclosing the return content (account requirements, recovery URLs, capabilities) and adding a security behavioral rule not expressible in annotations: 'Never ask for a token in chat.'

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 sentences with zero filler, front-loaded with the action, then output content, then the security caveat. Every sentence carries distinct information.

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?

No output schema exists, so the description reasonably summarizes return values, and with zero parameters there is little else an agent needs to invoke it. A minor gap is the absence of any guidance on failure/remediation flow when the account is not ready.

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 tool takes zero parameters and the schema is an empty object, so there is nothing for the description to clarify; baseline 4 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 (verify) and resource (the connected account and its readiness), and no sibling tool does anything comparable, so it is trivially distinguishable from the list/item management tools. An agent knows exactly what this returns: account requirements, recovery URLs, and connection capabilities.

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?

Explicitly frames the when: 'before creating or changing lists', which ties this precondition check to concrete mutation siblings like create_list, update_list, and add_item. It does not name an alternative check tool, but no sibling overlaps, so the usage context is effectively complete.

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