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

Annotations already establish readOnly=false and idempotentHint=true, and the description reinforces 'Not read-only' while adding useful nuance: duplicate monitors are reported rather than duplicated. It also discloses the privacy-relevant behavior that detail_link_enabled exposes the monitor's operator-side name and address, which is not apparent from the schema alone. This is strong behavioral disclosure for a mutating tool.

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 sentences deliver the core action, idempotency behavior, and a critical privacy warning without padding. The final 'Not read-only' is slightly redundant with the readOnlyHint=false annotation but costs little. Overall, compact and 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-add mutation with an output schema and safety annotations, the description covers the important operational consequences: batch/prompt behavior, deduplication, and the detail-link privacy caveat. An agent has enough information to select and call the tool correctly. The only minor gap is explicit sibling routing, which is more of a usage-guideline concern.

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 description only needs to add rationale. It adds meaningful context for public_name (reader-friendly, not operator-facing), public_group (filing related components), and detail_link_enabled (privacy tradeoff). It does not comment on every parameter like public_description, but the added value over the schema is clear.

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 concrete verb-object pair ('Add monitors to a status page as public components'), making the operation unambiguous. It clearly differentiates itself from siblings like create_status_page or update_status_page_component by focusing on adding monitors to an existing page. The scope is specific and actionable.

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 implies when to use it: when adding monitors to a status page in a batch operation, with duplicate handling explained. However, it never explicitly names alternatives such as update_status_page_component, nor states conditions that would make another tool preferable. This is adequate but not explicit routing guidance.

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