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

Beyond the annotations, the description discloses that all elements are overwritten, that the template remains a draft, and that publishing is outside this tool's ability. These are meaningful behavioral details not present in the annotations, and nothing contradicts the annotated readOnly, idempotent, or destructive hints.

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 core action is front-loaded, and the overwrite behavior is stated immediately. The multi-channel example is long but earns its place because the schema's elements definition is vague and the example documents a non-obvious nested structure.

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 mutation tool with a complex nested elements parameter and no output schema, the description covers the critical object shape and state behavior. It does not describe the response or publish workflow prerequisites, but the schema's detailed instructions for notification_id and state cover the remainder of the call contract.

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%, so the baseline is 3. The description adds real value by supplying a concrete multi-channel elements example and by reinforcing the state/DRAFT and publish limitation. The notification_id and version parameters are already sufficiently explained in the schema, so the description does not need to repeat them.

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?

States a specific action, 'Replace the elemental content of a V2 notification template,' and immediately clarifies that it overwrites all elements. This distinguishes it clearly from siblings like put_notification_element and replace_notification, which handle different granularity or scope.

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 by explaining overwrite semantics, channel-element targeting, and the draft-only limitation. However, it never explicitly names an alternative tool or states when to prefer this over put_notification_element or replace_notification, so the selection guidance remains implicit.

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