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

Annotations already declare readOnlyHint, idempotentHint, and non-destructive behavior, so the safety profile needs no restating. The description adds only that both endpoints and their events are returned, and says nothing about ordering, pagination, or what an empty result means for a business with no webhooks.

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 short, but the 'Step 10' prefix is sequence-dependent filler that will not match an agent's actual position in a workflow and is front-loaded ahead of the real content. The second sentence is efficient and does all the work.

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 single-optional-param read tool with a fully described schema and read-only annotations, little is strictly required. However, the unexplained 'Step 10' framing leaves an agent unsure whether this is a prerequisite step for notification setup, which is not resolved anywhere else in the definition.

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% and the single optional businessId already documents its default-to-API-key behavior. The description adds no meaning beyond the schema, so the baseline 3 applies.

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 second sentence gives a specific verb and resource: list the business's webhook endpoints and their events. The leading fragment 'Step 10: Get told about calls' is a workflow label rather than a purpose statement and adds ambiguity about whether the tool configures notifications or only reads them.

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?

'Step 10: Get told about calls' hints at where this fits in an onboarding sequence, which is implied usage guidance. It never states when to use this versus ringkit_create_webhook or what to do if no endpoints exist, so the agent must infer the read-only inspection role from the name alone.

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