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

No annotations are present, so the description carries the full burden of behavioral disclosure. It discloses nothing about side effects, session persistence, TTL enforcement, state changes, or lifecycle implications of creating a session.

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 three words long, but this is under-specification rather than concise effectiveness. No sentence earns its place because no substantive information is conveyed at all.

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?

For a tool with one meaningful parameter, no output schema, and no annotations, the description must explain what a session is, how TTL minutes behave, and how the result is used later. It does none of this, leaving the agent completely uninformed.

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?

Schema coverage is 0%, and the description adds no meaning to the single parameter 'ttl_minutes'. The agent cannot learn what the TTL controls, the units (though implied by the name), what null default means, or how the value affects session behavior.

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 'V1 Session Create' is a tautology that merely restates the tool name with a version prefix. It does not state what a session is, what creating one accomplishes, or how it differs from the sibling 'screenshot' tool.

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?

There is no guidance on when to use this tool versus alternatives. The sibling tool 'screenshot' exists, but no conditions, prerequisites, or routing context are provided to help an agent decide which to invoke.

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