getProviderInfo

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

With no annotations, the description carries the full burden of behavioral disclosure. The verb 'Get' implies read-only behavior, and the description names the retrieved data, but it does not mention potential empty results, return format, or whether this depends on user authentication/session state. This is a minimal but acceptable level for a simple getter.

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?

The description is a single, concise sentence with no filler. The key resource ('available DID / caller-ID numbers' and 'current SIP/VoIP provider') is front-loaded and clearly presented.

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 zero-parameter, read-only lookup tool, this description is nearly complete: it states exactly what data will be retrieved. Since there is no output schema, the description carries the burden of explaining return content, and it does so adequately, though it could add a note about the format or possible absence of data.

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?

The tool has zero parameters, so the description need not explain any input semantics. The schema is empty and fully covered, and the description focuses on the return content rather than inputs, which is appropriate. Baseline 4 applies for no-parameter tools.

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 clearly states a specific verb ('Get') and resource ('user's available DID / caller-ID numbers and current SIP/VoIP provider'). It is unambiguous, but it does not explicitly distinguish itself from sibling tools that might also involve user data or configuration.

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 guidance on when to use this tool versus alternatives, nor any mention of prerequisites or contexts where it is appropriate. The description simply states what it does without indicating when an agent should select it over other getter tools.

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