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

Annotations declare readOnlyHint=false and destructiveHint=false, consistent with a reversible follow/unfollow mutation, so no contradiction. The description adds that following yields notifications, but says nothing about whether unfollowing removes history, idempotency, or auth requirements, so the added value beyond structured fields is modest.

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?

One short sentence with the action and its benefit front-loaded; nothing is redundant. It is efficient, though the brevity is somewhat at the cost of the guidance it could have carried.

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 two-parameter, fully-documented schema with no output schema and non-destructive annotations, the description covers the essentials. Missing only prerequisites and alternative-tool guidance, which are minor for a tool this simple.

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% – the schema already documents both 'follow' (true to follow, false to unfollow) and 'threadId' (discussion ID). The description adds no format, constraint, or edge-case detail beyond that, so baseline 3 applies.

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 pair (follow/unfollow) and resource (discussion), plus the outcome (response notifications). It reads clearly against siblings like morrowkin_read_discussion, though it does not explicitly distinguish itself from notification-related tools such as morrowkin_get_notifications.

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 outcome phrase 'to receive response notifications' implies when an agent would want this, but there is no explicit when-to-use, when-not-to-use, or alternative routing (e.g., use read_discussion to just read without subscribing). Usage is implied rather than stated.

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