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

The description asserts a 'dry-run' (i.e., no side effects), while annotations declare readOnlyHint=false and destructiveHint=true, which is a direct conflict in the safety profile an agent relies on. No compensation is offered for permissions, external effects, or irreversibility despite destructiveHint and openWorldHint being true.

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 well-formed sentence with the purpose front-loaded and no filler. It is efficient, though its brevity contributes to the gaps elsewhere rather than being a structural flaw itself.

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 non-idempotent, destructive, open-world operation with no output schema and 0% parameter coverage, one sentence is far too thin. It omits what the test actually exercises, what the caller receives, and whether the operation has lasting effects.

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 0% for two parameters, and the description mentions neither phone_server_id nor note. The only hint is the implied target ('a customer phone server'), which does not compensate for the undocumented note field or the expected ID format.

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 states a specific verb and resource ('Dry-run verify a customer phone server'), which is distinguishable from siblings like list_phone_servers and create_phone_server. It does not explicitly name related tools such as check_number_requirements, so it stops short of full sibling differentiation.

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?

'Before assigning a number to it' gives a clear pre-assignment trigger, which is implied usage guidance. However, it names no alternatives (e.g., check_number_requirements) and gives no exclusions or note about what to do with the result.

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