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

With no annotations, the description carries the full behavioral burden, and it discloses almost nothing: the word "confidential" implies an encrypted/private channel, but there is no statement about authorization mechanics, whether the handshake creates persistent session state, idempotency, or side effects. For a protocol-style channel-establishment operation, this is a substantial 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. It is efficient, though the sparseness borders on under-specification rather than true conciseness.

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?

With no annotations, no output schema, and a stateful-sounding channel-establishment semantic, one sentence is not enough. The description should say what authorization is required, what the agent gets back, and what state the handshake creates; none of that is present.

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 description coverage is 100%, so the schema fully documents principal_hash, client_channel, and flight_trip_id. The description adds no syntax, format, or relationship detail beyond the schema, which is the expected baseline when the schema does the work.

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?

States a specific verb ("Establishes") and a named resource ("confidential KAM direct channel"), plus the target audience ("authorized B2A client agents"). It is reasonably distinguishable from the other b2a_* siblings, but it never differentiates itself explicitly from them, and what "establishing a channel" operationally means is left to inference.

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 a hint of a precondition ("for authorized ... client agents"), but no when-to-use, when-not-to-use, or alternative tool is named. An agent has no guidance on when this handshake is required versus calling e.g. geo360_b2a_price_context directly.

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