phantom_seal

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

Description mentions creating a sealed session and returning session ID/token, but does not disclose whether the original session continues, requires specific permissions, or what 'sealing' means for session state. With no annotations, the description should be more transparent about side effects and prerequisites.

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 front-loaded with purpose and example, then lists arguments. The curl command is helpful but slightly verbose. Overall concise and well-structured, though a few words could be trimmed without losing meaning.

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 10 parameters, no annotations, and no output schema, the description covers purpose, example usage, all parameters, and return values. Missing are error behavior, authentication, and rate limits, but the core functionality is well explained.

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?

Despite 0% schema coverage, the description explains each of the 10 parameters in plain language, including structure for complex types like conversation and files. This adds significant value beyond the input schema, which only provides names and types.

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 seals a session for cross-device resume, distinguishing it from sibling tools like phantom_sessions (list) and phantom_fork (fork). The verb 'seal' is specific and the resource 'session' is explicit.

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 gives a curl command example for resuming, implying use for cross-device transfer, but never explicitly states when to use this tool versus siblings like phantom_fork or phantom_status. No exclusion criteria or alternative guidance provided.

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