Multilead Open API MCP Server

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It states the action ('marks all messages in a specific conversation thread as read/seen') but lacks critical details: it doesn't specify if this requires specific permissions, whether it's idempotent, what happens if the thread doesn't exist, or any rate limits. For a mutation tool with zero annotation coverage, this is a significant gap in transparency.

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 well-structured and appropriately sized: it starts with a clear purpose statement, elaborates in a second sentence, and includes separate sections for Args and Returns. However, the 'Returns' section ('Success confirmation') is vague and could be more informative, slightly reducing efficiency.

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 moderate complexity (a mutation with 3 parameters), no annotations, and an output schema present (which should cover return values), the description is minimally adequate. It explains the action and parameters but lacks behavioral context and usage guidelines. The output schema likely details the 'Success confirmation', so the description doesn't need to elaborate further on returns, keeping it from being incomplete.

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 description lists the three parameters (user_id, account_id, thread) and briefly describes 'thread' as 'Thread ID to mark as seen', adding minimal semantics beyond the schema. With 0% schema description coverage, the description partially compensates by naming parameters but doesn't explain their relationships (e.g., how user_id and account_id interact) or formats. This meets the baseline for low coverage but doesn't fully address the gap.

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 purpose with a specific verb ('mark') and resource ('messages in a thread'), and it elaborates on what 'as seen' means ('read/seen'). However, it doesn't explicitly differentiate this tool from potential sibling tools like 'get_unread_conversations' or 'get_messages_from_a_specific_thread', which are related to message status but serve different purposes.

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. It doesn't mention prerequisites (e.g., whether the user must have access to the thread), exclusions, or related tools like 'get_unread_conversations' for checking status before marking. This leaves the agent without context for optimal tool selection.

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