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

With no annotations provided, the description carries the full burden and does so thoroughly. It discloses automatic loading, the list-before-change requirement, exact vs case-insensitive matching, the semantic difference between blocking and ignoring, and performance-conscious usage.

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?

Five dense sentences, front-loaded with the core purpose, and every sentence adds operational value. There is no fluff or repetition, and the structure flows from overview to operations to performance guidance.

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?

Given the empty schema, absent annotations, and no output schema, the description is remarkably complete. It covers operation semantics, filtering behavior, state-change sequencing, and safe exploration practices, leaving the agent well-equipped to invoke the tool.

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, so the description must compensate. It does, explaining operation values, exact remote names, list.nameFilter as a case-insensitive substring filter, and summaryOnly/limit usage. This is exactly the semantic depth an agent needs.

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+resource: 'Inspect and control Cobalt remote-spy state.' It further enumerates distinct operations (list, block/unblock, ignore/unignore), making it easy for an agent to distinguish from sibling tools like execute or list-clients.

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 explicit operational sequencing: 'Use operation=list before changing a remote' and recommends starting with summaryOnly=true and small limits. It lacks explicit comparison to sibling tools, so it stops short of full alternative-selection guidance.

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