web_session_list

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

With no annotations, the description carries the burden. It discloses that logins are persisted on disk and that the operation is a list (read-only), but does not explain return format, side effects, or whether profiles can be expired/invalid. The truncated clause may have added more, but based on visible text this is minimal.

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 description is front-loaded and efficient, beginning with the purpose. However, the text appears truncated mid-sentence, so the structure is incomplete and a full sentence is not presented.

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 zero-parameter list tool with no output schema, the description is largely complete: it states what is listed and that entries are saved on disk. The truncated mention of web_login/web_navigate slightly reduces completeness, and return details are not specified, but the tool is simple enough.

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 is empty with zero parameters, so the baseline of 4 applies. There are no parameter semantics to document, and the description doesn't need to compensate for schema 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 'Lists your web-automation login profiles' and scopes to 'every SAVED login (persisted on disk)', clearly distinguishing this from sibling actions like web_login or web_session_close. The verb 'Lists' plus the specific resource makes the purpose unambiguous.

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 references web_login/web_navigate as consumers of saved logins, implying when to use the list. However, it does not explicitly state exclusions or alternative tools, so it provides clear context but not full when-not-to-use guidance.

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