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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is fully covered by structured data. The description contributes one genuinely new behavioral fact — that results include current status and last message — but omits whether the snapshot is live or cached, whether results are paginated or bounded, and how an empty workspace is represented. With annotations carrying most of the burden, a 3 is appropriate.

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 sentence with zero filler, front-loading the action and scope before the return contents. Nothing in it is redundant with the tool name and nothing could be trimmed without losing information.

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, read-only listing tool with rich annotations, the description covers the essentials: scope (workspace), action (list), and payload (status plus last message). The only meaningful gap is that no output schema exists and the description does not say what a monitor entry's other fields look like or how many results to expect.

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 no parameters and the schema is an empty object, so there is no parameter meaning to convey; the description correctly avoids inventing any. It also does not over-promise filtering or paging options that the schema lacks, which keeps it consistent with the zero-argument contract.

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 and resource ('List the workspace's monitors') and adds what each entry carries ('current status and last message'), which goes beyond restating the name. It does not, however, distinguish itself from the closely related inspect_monitor or from other list_* siblings, so an agent must infer that this is the bulk-enumeration counterpart to the single-monitor inspect.

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 only implied: an agent can reasonably infer 'use this to discover monitors, then use inspect_monitor for detail,' but the description never says so, nor does it mention when a listing is inappropriate (e.g., already knowing the monitor ID). No prerequisites or follow-up routing are given.

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