GitHub MCP Server

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

With no annotations provided, the description carries full burden but offers minimal behavioral context. It doesn't disclose whether this is a read-only operation (implied but not stated), pagination behavior beyond what's in the schema, rate limits, authentication requirements beyond 'authenticated user', or what the output contains. The description adds almost no value beyond the basic purpose.

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 extremely concise - a single sentence that states the core purpose without any wasted words. It's front-loaded with the essential information and contains no unnecessary elaboration or repetition.

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 (5 parameters, read operation) and the presence of both comprehensive input schema (100% coverage) and output schema, the description is minimally adequate. However, it lacks important context about behavioral aspects that aren't covered by structured fields, such as typical use cases, error conditions, or relationship to sibling notification tools.

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?

With 100% schema description coverage, the baseline is 3. The description adds no parameter information beyond what's already documented in the schema - it doesn't explain parameter interactions, default behaviors, or usage patterns. The schema already thoroughly documents all 5 parameters with their purposes and defaults.

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 ('List') and resource ('notifications for the authenticated user'), making the purpose immediately understandable. It doesn't explicitly differentiate from sibling tools like 'mark_notifications_read' or 'mark_thread_read', but those are distinct operations rather than direct alternatives for listing.

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 sibling tools like 'list_issues' or 'list_pull_requests' that might provide overlapping notification contexts, nor does it specify prerequisites or typical usage scenarios beyond the basic function.

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