chimerax_session_open

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

With no annotations, the description must disclose behavioral traits. It only states 'Open a saved ChimeraX session' and mentions the return value, but does not describe side effects, requirements (e.g., running ChimeraX instance), state changes, or error conditions. This is insufficient for a tool that likely modifies the application state.

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 and well-structured: a one-sentence purpose statement followed by clear Args and Returns sections. No unnecessary information is included.

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?

While the tool is simple and has an output schema, the description lacks usage guidelines and behavioral context (no annotations, no alternatives). It is adequate for understanding what the tool does but not fully complete for an agent to select and invoke it appropriately in all situations.

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 adds meaning to the sole parameter 'path' by specifying it as a path to a .cxs session file, which is not present in the schema. This compensates for the 0% schema description coverage and clarifies the expected input format.

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 opens a saved ChimeraX session file (.cxs), which is a specific verb+resource. It does not explicitly contrast with sibling tools like chimerax_open or chimerax_session_save, but the focus on 'session' makes the purpose clear enough for differentiation.

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 such as chimerax_open or chimerax_session_save. There is no mention of prerequisites, scenarios, or exclusions, leaving the agent without decision-making context.

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