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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is covered. The description goes further by disclosing default behavior ('with no query it returns every exchange NetActuate publishes a page for') and enumerating the returned fields (slug, name, description, page's opening paragraph, and URL), which goes beyond what the annotations provide.

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?

Front-loaded with the core purpose, then default behavior, then usage examples, then sibling routing. Four sentences, each carrying distinct information with no redundancy or filler.

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?

No output schema exists, yet the description describes the shape of each result (slug, name, description, opening paragraph, URL), so the agent knows what comes back. Combined with the query behavior and sibling pointers, nothing needed to call this correctly is missing.

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 the baseline is 3. The description adds real semantics on top: no argument means return everything, and the note that exchange pages name cities rather than regions tells the agent how to phrase the query value — information the schema's own description does not supply.

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 precise verb+resource (lists internet exchanges where NetActuate offers colocation, bare metal, VMs or remote peering) with concrete examples (AMS-IX, DE-CIX, LINX). It explicitly distinguishes itself from siblings by naming get_netactuate_page for full pages and list_data_centers for the facilities themselves, so an agent can route correctly without opening other schemas.

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 when-to-use scenarios (peering/interconnection questions such as 'does NetActuate peer at DE-CIX') and names the two alternative tools with the conditions that select them. It even adds a filtering caveat — exchange pages name cities, not regions — which steers query construction.

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