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

Annotations declare readOnlyHint=false, openWorldHint=false, idempotentHint=true, destructiveHint=false; the description adds the persistence constraint ('until they click OK') and the human-in-the-loop UX. It does not state whether the highlight blocks or errors if the owner is offline, but that gap is minor given annotation coverage.

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 tight sentences: what it does, when to use it, and the one optional input. No filler; the target URL grounds the action immediately.

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 one-parameter, human-triggered debug tool with annotations covering the safety profile and no output schema, the description tells the agent everything needed to call it correctly and to know what the human will see.

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% and there is only one optional parameter; the description repeats that the note is shown with the highlight but adds no format or length constraints. Baseline 3 is appropriate because the schema already carries the semantics.

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 action (highlight this exact registration on the MCP Servers page), the target (owner's page at a concrete URL), and the trigger (human clicks OK). No sibling in the list does anything similar, and the debugging intent ('which registration am I actually riding?') makes the tool's distinct role unmistakable.

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 clear context (debugging which registration is active, human-triggered, user sees a highlight) but does not state when NOT to use it or name an alternative. The 'human triggers it' framing is useful, but a caveat like 'for live demos, prefer connections_pulse' is absent.

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