Session Start

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

No annotations are provided, so the description must carry the full burden. It only mentions the HTTP method (GET) which implies read-only, but does not disclose any authentication requirements, potential errors, or return format. There's no contradiction, but it's minimal.

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 concise at 26 words, with essential info front-loaded (purpose and endpoint). It's efficient and no fluff, though it could benefit from a brief note on what 'session start info' contains.

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 is simple (one optional parameter, no output schema), the description is adequate but minimal. It lacks details on how the agent name affects the response or any typical use cases. Since there are many sibling tools, a bit more context on when to call this would improve completeness.

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 only parameter 'agent' has schema description coverage of 100%, so the schema already documents it as 'Agent identifier.' The description adds 'Optionally pass the agent name,' which clarifies optionality and purpose, but doesn't provide deeper semantics like default behavior when omitted.

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 it fetches session start info and mentions the HTTP endpoint, which adds specificity. However, it does not explicitly differentiate from sibling tools like sdnext_version or sdnext_status, though the unique resource ('session start') helps distinguish it.

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 usage via the endpoint and optional agent parameter, but does not state when to use this versus alternatives like sdnext_status or sdnext_version. It gives no explicit context or exclusions, leaving the agent to infer.

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