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

Annotations (readOnlyHint=false, destructiveHint=false, openWorldHint=false) cover only the safety profile; the description adds real behavior: empty string disables a channel and the first webhook enable returns notify_secret, the HMAC-SHA256 key for the X-Signature header. It does not state whether an existing secret is re-issued or how to rotate it, but the mutation and secret-generation semantics are well disclosed.

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?

Three dense sentences, front-loaded with the action and the two channels, then the disable convention, then the non-obvious side effect. No filler or repetition.

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?

With no output schema, the description compensates by naming the key return value (notify_secret on first webhook enable). It lacks detail on what happens when both fields are empty, whether the secret is retrievable later, and the exact response shape, but it is sufficient for an agent to invoke the tool correctly.

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 100%, so both parameters are already fully documented in the schema (URL format for POST, empty string to disable). The description adds only the webhook/email role mapping and the empty-string convention, matching the baseline 3 for schema-documented params. The returned notify_secret is a return value, not a parameter, so it does not lift this dimension.

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: configuring the monitoring notification delivery channel, with the two concrete mechanisms (webhook notify_url, email notify_email). It is clear what the tool does, but it never distinguishes itself from the related monitoring_subscribe / monitoring_unsubscribe / monitoring_list siblings.

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?

It explains the disabling convention ('пустая строка отключает канал'), which is useful operational guidance, but gives no when-to-use context relative to the other monitoring tools and no prerequisites for having a subscription first.

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