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

The description adds important behavior beyond the annotations: it opens nothing by itself and only returns instructions with screens, buttons, and fields. This aligns with readOnlyHint=true and destructiveHint=false and prevents the agent from assuming the tool performs the revocation. It also explains the required follow-up path through the browser tools.

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 with the purpose and the key behavioral constraint that it only returns instructions. The third sentence about Plex's official API and lack of an official MCP server is somewhat tangential, and the phrase 'from ChatGPT, Claude or any AI agent' is marketing-like, but the overall structure remains efficient.

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 no output schema, the description reasonably explains what the tool returns: step-by-step Plex instructions covering screens, buttons, and fields. It also clarifies that the actual revocation happens through separate browser tools. It does not specify the return format or whether the steps are account-specific, leaving a minor gap.

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 has zero parameters, so there is no parameter semantics to explain. The baseline for a zero-parameter tool is 4, and the description does not need to add parameter details.

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: revoke Plex library access. It also clarifies that the tool itself only returns step-by-step instructions and does not perform the revocation, which distinguishes its real behavior from the name. It does not explicitly differentiate from the sibling plex_grant_library_access tool, so it falls short of a 5.

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 clear usage context: call this to get Plex UI steps, then use cotlet_browser_* tools in the Plex Cloud Browser to perform the action. It does not states when not to use it or explicitly compare it with plex_grant_library_access, but the workflow guidance is clear.

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