Ghl A2P Status

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

The description explicitly says 'Read-only', which is a useful behavioral disclosure. However, no annotations are provided, so the description carries the burden. It does not disclose what happens if location_id is null, whether the tool returns an error for missing sub-account records, or any rate-limit/auth requirements. The read-only claim is clear but minimal.

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 two short sentences with no filler. The key action ('Read') and scope ('phone-system sub-account record') are front-loaded, and the read-only note is concise. Every word earns its place.

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?

The tool has an output schema, which likely covers return values, and a single optional parameter. The description is adequate for a simple read operation, but it lacks guidance on the location_id parameter's semantics and does not distinguish itself from the closely named sibling ghl_a2p_registration_status. Given the low schema coverage and no annotations, a bit more context would be needed for full completeness.

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%, so the description must compensate. The description mentions the resource being read but does not explain the location_id parameter's meaning, format, or behavior when null. With only one optional parameter, the gap is moderate; the description adds some context but not enough to fully clarify the parameter's role.

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 ('Read') and resource ('phone-system sub-account record'), and mentions the A2P 10DLC state. It is clear enough to distinguish from most siblings, though it does not explicitly name a sibling alternative like ghl_a2p_registration_status, which is a closely related tool.

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?

The description implies usage context: it is a read-only status check for A2P 10DLC state. However, it does not explicitly state when to use this tool versus ghl_a2p_registration_status or other phone-number tools, nor does it provide exclusions or alternative routing.

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