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

Annotations already declare readOnlyHint=true and openWorldHint=false, so the agent knows this is a safe, non-mutating, account-scoped read. The description adds the ownership scoping detail but says nothing about result volume, ordering, or pagination, which are the behaviors an agent would still wonder about.

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?

A single front-loaded sentence with no filler or redundancy. It is appropriately sized for a trivial read tool, though it is short enough that it could have carried one more useful clause (e.g. what the list contains) at no cost.

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, non-destructive list operation with annotations covering the safety profile, the description is minimal but workable. Since there is no output schema, a brief indication of what a connector entry contains would have closed the remaining 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 takes zero parameters, so there is nothing for the description to disambiguate and the baseline of 4 applies. Schema coverage is reported at 100% for an empty object, so no compensating text is required.

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 (list) and resource (connectors) with an ownership scope ('under your account'), which is enough to distinguish it from monitor_register_connector and monitor_delete_connector. It does not, however, explicitly contrast itself with the near-miss sibling monitor_list_templates.

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?

Usage is implied by the verb list — you call this when you need the registered connectors. There is no explicit when-to-use/when-not statement and no mention that registering or deleting requires the sibling tools, so the routing is left to inference.

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