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

The annotations already declare that this is not read-only, not idempotent, and not destructive, so the safety profile is covered structurally. The description adds the object being acted on (an update notification) but says nothing about whether the dismissal persists across sessions, is per-user, or can be undone — meaningful gaps for a state-changing call.

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?

Two short sentences with the action stated first and the trigger condition second; every clause carries information and nothing is padded.

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 zero-parameter, non-destructive toggle with no output schema, the description covers what it does and when to invoke it. Only the durability/persistence behavior of the dismissal is left unstated, a minor gap given the tool's simplicity.

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?

The tool takes zero parameters, so there is no parameter semantics to explain; the baseline for a no-arg schema applies. Nothing in the description misleads about inputs.

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 names a specific verb and resource ("Dismiss the MCP update notification"), so an agent knows exactly what the call does. It stops short of distinguishing itself from any sibling, though no near-duplicate tool is present for it to be confused with.

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 supplies a concrete activation condition — the user saying "don't notify me" or similar — which is unusually actionable for a trigger-style tool. It does not state when not to call it, which keeps it below a 5.

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