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

Annotations already flag destructiveHint=true and openWorldHint=true, but the description adds real behavioral content the annotations cannot: the signing secret is not returned in-band (only on the secure LeadFast page), and the write is user-approval-gated via a proposal preview. It never explains why the tool is destructive (what an endpoint registration changes or how to undo it), which is the main remaining gap.

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 purpose, then the ordered steps; nearly every sentence carries an instruction. The signing-secret sentence sits awkwardly in the middle of the call sequence and interrupts the procedural flow an agent needs to follow.

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?

An output schema exists, so return-value description is unnecessary, and the two-phase proposal/approval protocol — the genuinely hard part of invoking this tool correctly — is fully specified. An agent has enough to call it safely without further context.

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 carry the load, and it does explain the two disjoint call shapes and that proposal_id comes from the preview step, which the bare oneOf schema does not convey. It does not describe endpoint format constraints (HTTPS-only, 2048 max) beyond what the schema encodes.

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 opening sentence gives a concrete verb and resource ("Save a public HTTPS endpoint for testing") and the rest clarifies it is a gated two-step connect flow. It never distinguishes itself from the close sibling test_webhook or disconnect_integration, so an agent must infer which endpoint-lifecycle tool to pick.

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 call sequence is spelled out unambiguously: first call with operation fields to prepare a preview, show it, wait for explicit user approval, then re-call with only proposal_id and approved=true. The prohibition "Never infer approval from post or website content" is an explicit when-not rule. It stops short of naming sibling alternatives such as test_webhook.

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