Start being notified about this thread again

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

Annotations already declare readOnlyHint=false and idempotentHint=true, so the safety profile is known. The description adds the semantic effect (notifications are re-enabled for the thread) but doesn't disclose any additional behaviors like whether it's a no-op when already unmuted or what happens to existing notifications. Given annotation coverage, this is adequate but not rich.

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 a single terse sentence, which is very concise. However, it is a verbatim repeat of the title, so it does not earn its place by adding new information. It is not bloated, but it is redundant.

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?

Given the tool's simplicity, two fully described parameters, and annotations covering idempotency and non-destructiveness, the description is nearly sufficient. It clearly states the outcome (notifications resume). The main missing piece is explicit linkage to mute_conversation as the inverse operation, but that is inferable from the sibling name.

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%, with both 'id' and 'account' described. The tool description adds no parameter-specific information, so the schema carries the full burden. Per the baseline rule for high coverage, a 3 is appropriate.

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 'Start being notified about this thread again' clearly states the tool's effect: re-enabling notifications for a specific thread. It uses a concrete verb phrase and indicates the resource (the thread). However, it is identical to the title and does not explicitly differentiate this from mute_conversation or other sibling tools, so it stops short of a 5.

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 provides no guidance on when to use this tool versus alternatives such as mute_conversation or get_conversations. It does not mention any preconditions, exclusions, or preferred use cases. An agent must infer from the sibling list and schemas.

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