readSlackChannel

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

With no annotations, the description must disclose behavior. It adds the thread-reply inclusion and clarifies the read nature ('retrieves'). However, it omits further traits such as pagination, sorting, rate limits, or required permissions. It is a minimal disclosure that provides some value but lacks depth.

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, concise sentence that front-loads the core action and resource. Every word adds value; no fluff or redundancy.

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 straightforward read tool with 100% schema parameter coverage, the description is adequate. It does not explain return format or pagination, but these are somewhat covered by the schema defaults and the tool's purpose. It is complete enough for an agent to invoke correctly in most cases.

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%, so the schema already explains all parameters. The description adds no new parameter-level semantics; it simply restates the 'channel' and 'thread' concepts already present in the schema.

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 tool's function: 'Retrieves conversation history from a specified Slack channel, including thread replies.' It uses a specific verb ('retrieves') and resource ('conversation history'), and the mention of thread replies differentiates it from sibling tools like listSlackChannels and postSlackMessage.

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 implies when to use the tool: when needing message history from a channel. It does not explicitly name alternatives or exclusions, but the context is clear enough that an agent would understand this is for reading messages, not for listing channels or posting.

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