fl_close

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

No annotations are provided, so the description carries the full behavioral burden, yet it says nothing about side effects — whether unsaved state or in-flight recordings are discarded, whether closing is idempotent, or what happens if the tab handle is invalid. For a destructive-feeling operation this is a significant gap.

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?

A single front-loaded sentence with no filler or redundancy. It is short, but nothing in it needs trimming.

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 one-parameter mutation tool with no annotations and no output schema, the description should at minimum explain the tab identifier format and the effect of closing. Neither is covered, leaving the agent under-equipped to call it correctly.

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?

There is one required parameter, 'tab', with 0% schema description coverage, and the description does not explain what form the identifier takes (name, handle, or index) or where to obtain it. The only hint is the word 'tab' in the description, which adds almost nothing beyond the schema.

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?

"Close a Flintrail tab" states a specific verb (close) and resource (tab), making the operation immediately identifiable and distinct from siblings like fl_open and fl_tabs. It stops short of differentiating scope or noting what closing means relative to those siblings, so it is clear but not maximally so.

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 no guidance on when to close versus leave a tab open, no prerequisite that the tab exist or be open, and no reference to sibling tools such as fl_tabs (to find a tab) or fl_open (its counterpart). An agent must infer all usage context.

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