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

Goes beyond the annotations by disclosing the auth requirement ('Requires an API key') and the side effects implied by 'any incident opened or closed', which is consistent with readOnlyHint=false and openWorldHint=true. It also explains that execution happens outside the schedule, which the annotations cannot convey.

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?

Two sentences, front-loaded with the action and the effect, followed by the usage cue and the auth note. Dense and mostly waste-free, though the parenthetical '(outside the schedule)' and the auth sentence could be tightened slightly.

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?

With no output schema, the description compensates by enumerating the return payload (pass/fail per check, latency, judge cost, incidents opened/closed) and stating the auth prerequisite. Minor gaps remain, such as behavior when the target has no checks or whether incident creation is a side effect worth warning about.

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 description coverage is 100%, so the schema already documents targetId. The phrase 'one of your targets' adds only a marginal hint about what the id refers to; there is no id format or lookup guidance beyond the schema.

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?

Specific verb (Run) plus resource (every check of one of your targets) with a clear scope qualifier (immediately, outside the schedule). It is easily distinguished from siblings like agentcheck_add_check, agentcheck_get_status and agentcheck_create_target, which manage checks/targets rather than executing them.

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 explicit trigger moments: 'right after enrolling, or to confirm a fix.' That is clear situational guidance, but it does not name an alternative tool (e.g. when to prefer the scheduled run or get_status instead) or state when not to use it.

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