WayStation MCP Server

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It states the action ('Sends a text message') which implies a write operation, but doesn't mention any behavioral traits like rate limits, authentication requirements beyond the implied workspace context, error conditions, or what happens on success/failure. For a mutation tool with zero annotation coverage, this leaves significant gaps in understanding its behavior.

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, efficient sentence that front-loads the core purpose without unnecessary words. Every element ('Sends a text message', 'to a specified Slack channel', 'in the authenticated user's workspace') contributes directly to understanding the tool's function, with zero wasted content.

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 this is a mutation tool (sending messages) with no annotations and no output schema, the description is incomplete. It doesn't address what the tool returns, error handling, authentication details beyond the workspace mention, or how it differs from similar tools. For a tool that performs write operations in a collaborative platform, more context about behavior and outcomes is needed.

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 parameters (channel, message) well-documented in the schema. The description adds no additional parameter semantics beyond what's already in the schema descriptions, such as format examples or constraints. This meets the baseline of 3 since the schema adequately covers parameter documentation.

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 action ('Sends a text message') and target resource ('to a specified Slack channel'), making the purpose immediately understandable. It distinguishes from siblings like postTeamsMessage by specifying the platform (Slack), though it doesn't explicitly contrast with other messaging tools. The description avoids tautology by not just restating the tool name.

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 like postTeamsMessage or other communication tools in the sibling list. It mentions the context ('in the authenticated user's workspace') but offers no explicit when/when-not instructions or comparisons to similar tools, leaving the agent to infer usage scenarios.

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