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

Annotations already cover the read-only/idempotent/non-destructive profile, yet the description adds substantial context: scoping to public bases, no private access via following, a 50-base cap, no-store responses, and no email/push delivery. This goes well beyond what the structured fields declare.

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?

The purpose is front-loaded and correct, but several sentences describe sibling behaviors ('Unfollowing removes all notices', 'Updates show the latest published version', repeated publication) rather than this read operation. The caveat list is dense and only partially on-topic.

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 zero parameters, no output schema, and annotations already covering safety, the description supplies the account prerequisites, scoping, limits, and caching posture an agent needs. Only the exact return shape is unstated, which is acceptable here.

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, so per the baseline there is nothing for the description to disambiguate. Schema coverage is 100%, leaving no semantic gaps.

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: 'List the public bases you follow.' This clearly distinguishes it from generic list_bases or get_base_following, though it never explicitly names the sibling it differs from. An agent understands the operation without opening the schema.

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?

It gives a prerequisite ('Requires a personal account or personal API key') which frames when it is callable, but never states when to prefer this over siblings like list_bases or followed_base_updates. Usage context is implied rather than explicit.

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