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

With no annotations provided, the description does carry the burden, and it does disclose two useful traits: this is a write operation and it costs no credits. However, it omits whether the call is idempotent, what happens if the notification is already read, and any permission requirements.

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, front-loaded with the action and followed by the cost/side-effect note. No filler, though the brevity is close to under-specification rather than economical conciseness.

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 trivial one-parameter mutation with no output schema and no annotations, the description covers the action and the credit/cost profile, which is roughly the minimum viable. It leaves the id's origin and the already-read behavior unspecified.

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% and there is one required parameter, 'id', whose meaning the description never clarifies (notification identifier? which scope?). At low coverage the description is expected to compensate, and it does not.

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 verb (mark read) and resource (CRM notification), and the qualifier 'single' implicitly contrasts with the crm_mark_all_notifications_read sibling. It stops short of naming that sibling explicitly, so differentiation requires a small inference.

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?

No when-to-use guidance and no routing to crm_mark_all_notifications_read or crm_list_notifications is given. The word 'single' hints at the alternative but the description never states the condition that selects this tool over the bulk variant.

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