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

The description goes well beyond the annotations by disclosing the trial-run behavior, the single batched confirmation, and the partial-failure semantics: failing items are reported while the rest are still created. It also states 'Not read-only,' which aligns with the readOnlyHint=false annotation and reinforces the mutation risk.

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?

The description is five sentences with no filler: batch confirmation, trial run, partial-failure behavior, when-to-use guidance, and parity with create_monitor are all packed in efficiently. The most decision-relevant facts are front-loaded.

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 batch creation tool with complex nested schema, the description covers invocation behavior, failure modes, confirmation flow, safety, and relationship to the sibling tool. The presence of an output schema and detailed parameter schemas means return-value and field-level details do not need to be repeated in the description.

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 baseline is 3; the schema already documents the monitors array and every per-monitor field with rich detail. The description adds the cross-tool pointer 'Same per-monitor fields and same limits as create_monitor' and the batch trial-run behavior, but it does not need to explain individual parameters further.

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?

The description opens with a specific verb and resource: 'Create several monitors at once,' which clearly states the batch capability. It explicitly distinguishes itself from create_monitor by naming the sibling and saying 'Prefer this over repeated create_monitor calls,' leaving no ambiguity about which tool to choose.

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?

The description gives an explicit usage condition: 'whenever the user names more than one thing to watch,' and directly names the alternative (create_monitor) and the trade-off ('it costs them one prompt instead of many'). It also notes that per-monitor fields and limits are the same as create_monitor, so the agent knows what carries over.

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