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

Annotations already declare this is a non-destructive, non-idempotent write. The description adds real context beyond them: the slug becomes the page's public address and is auto-derived from the title when omitted, and creation is scoped to the plan's pages. It does not say what happens on duplicate slug/title collisions.

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 short sentences, no redundancy, and the core purpose is front-loaded before the slug detail.

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 two-parameter creation tool with full annotations, the description covers purpose, slug behavior, and scoping. Remaining gaps are edge-case behavior (duplicate slugs, whether pages can be nested or reordered), which are minor but not fully covered.

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 100%, so baseline is 3. The description goes further by explaining the semantic role of slug (public address) and the defaulting rule from title, information the schema does not contain.

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 verb and resource ('Add a page') and explains what a page is for ('group monitors under'), which distinguishes it from get_page/list_pages/delete_page. It stops short of explicitly naming which sibling to use instead when the page already exists.

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?

Usage is implied by the mention of grouping monitors and the plan's pages, but there is no explicit when-to-use vs update_page/get_page guidance and no stated prerequisites such as page limits or permissions.

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