slack_read_channel_messages

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

No annotations are provided, so the description carries full burden. It only says 'Read', implying a read-only operation, but fails to disclose any behavioral traits such as whether it reads all messages, recent messages, or how it handles channels without messages. No rate limits or authentication needs are mentioned.

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 sentence that is front-loaded with the key action. It is concise, but it sacrifices important details for brevity. It earns a 4 for efficiency, though it could be slightly more informative without losing 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?

Given no output schema and no parameters, the description should explain how the channel is determined and what messages are returned. It provides none of this context, leaving a significant gap. The tool is incomplete for an agent to use without further assumptions.

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 input schema has no parameters, and schema description coverage is 100% (trivially). The description adds no additional meaning beyond 'Read messages from a Slack channel', which does not explain how to specify the channel. Given the high coverage, a baseline of 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 clearly states the verb 'Read' and the resource 'messages from a Slack channel', which is specific. However, it does not specify which channel or how to specify it, especially since the input schema has no parameters. This ambiguity slightly reduces clarity, but it distinguishes from sibling tools like slack_search_messages.

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 guidance is provided on when to use this tool versus alternatives like slack_search_messages or teams_read_channel_messages. The description does not mention prerequisites or context, leaving the agent without usage criteria.

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