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

No annotations are provided, so the description carries the full disclosure burden. It does reveal the return shape at a high level ("returns services"), default and maximum result counts, and the intended chaining to list_extension_methods, but says nothing about ranking/relevance, permissions, or what happens when nothing matches.

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 dense sentences, front-loaded with the core capability and the disambiguating example, then limits, then the next step. No redundant or filler wording.

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 must convey returns; it does so briefly ("returns services") and implies rows carry hostType/packageId/serviceId via the next-step instruction. It is complete enough to drive a correct call and follow-up, with minor gaps around result ordering and empty-result behavior.

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?

Schema coverage is 100%, so all four parameters are already documented, including limit bounds and the isAgentTool semantics; the description repeats the default/max limit rather than adding to it. The only genuinely additive note is propagating the same isAgentTool value to the next call.

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+resource ("Search shared extensions") and clarifies the unusual retrieval mode with a concrete intent→service example ("send notifications to a team chat" → Slack, Telegram, Teams). It does not explicitly contrast itself with the sibling search_extensions or list_extension_services, so the distinction between semantic search and plain listing must be inferred.

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?

Gives a clear usage context (describe the task in plain words) and an explicit follow-up step: call list_extension_methods with the row's hostType/packageId/serviceId and the same isAgentTool. It does not state when to prefer this over search_extensions, so there is no exclusion guidance.

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