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

Annotations already declare readOnly/idempotent/non-destructive/closed-world, and the description reinforces rather than contradicts them while adding genuinely new context: 'no account' (no auth needed) and a preview of return contents. It stops short of noting any rate limits or pagination on the daily tallies.

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?

Front-loaded with the core question ('whether one listed agent kept answering'), then supporting detail. It is dense but a touch run-on, packing return contents into a trailing sentence that repeats material already stated earlier.

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 carries the return-value burden and does so ('the uptime figures, the daily tallies and the list of changes'), plus the safety and auth posture. An agent has everything it needs to call this correctly.

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 0% and the only hint about agentId is the phrase 'one listed agent', which implies the ID must reference a registered/listed agent but gives no format, casing, or lookup guidance. With a single required param and no schema documentation, a 3 is the ceiling for the added meaning here.

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 subject and scope: uptime over 7/30/90 days, daily tallies, and every state change with its underlying error. It explicitly contrasts itself with the sibling get_agent, so an agent can distinguish the two without opening either schema.

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?

'Use it before depending on an agent for repeated calls' names the decision this tool informs, and it names the alternative (get_agent) with the condition that selects it ('shows only its current state'). Both when-to-use and the alternative-routing rule are explicit.

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