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

Annotations already declare destructiveHint=true, idempotentHint=true and openWorldHint=true, so the safety profile is covered externally. The description adds the useful scope of what is being mutated (display attributes only, not monitor configuration), but it does not say whether omitted fields are left untouched or reset, nor what happens to a monitor whose group is removed — the key behavioral question for a destructive update.

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?

A single front-loaded sentence that names the action first and then the affected attributes. No filler, though the attribute list is a near-restatement of the parameter set rather than a prioritized summary.

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 eight parameters at full schema coverage, rich annotations, and no output schema, the description needs only to convey purpose and scope, which it does. The one remaining ambiguity — partial vs full update semantics — is a real gap, but the structured fields plus annotations already carry most of what an agent 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 description coverage is 100% and each parameter carries its own description (including that groupId=null removes the monitor from its group and empty displayName falls back to the monitor name). The description's enumeration of fields merely mirrors the schema, adding no syntax or interaction details beyond it, so the baseline 3 applies.

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 gives a specific verb ('Change') and a precisely enumerated set of per-monitor status-page display attributes (name, graph, response time, certificate, position, group). An agent can tell this is a per-monitor display-settings update rather than a monitor-level settings update. However, it does not distinguish itself from overlapping siblings such as vs_status_page_monitors_display and vs_status_page_monitors_reorder, which appear to touch the same fields.

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?

There is no statement of when to use this tool versus the closely related vs_status_page_monitors_add, vs_status_page_monitors_display, or vs_status_page_monitors_reorder. The reader must infer from the field list that this is the general editor for an already-added monitor, and no prerequisites (monitor must already be on the page) are given.

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