get_a2a_agent_card

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

With no annotations, the description carries the full behavioral burden. It does add value by disclosing the A2A enablement prerequisite and revealing this reads a well-known discovery document, implying a read-only fetch. It stops short of saying what happens when A2A is disabled (error vs empty) or whether any caching/version constraints apply.

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?

Two tight sentences, zero filler, with the operative purpose stated first and the prerequisite second. Nothing is redundant with the schema or the name.

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?

There is no output schema and no annotations, so the description is the only guide to what comes back, and it never describes the agent card's contents or shape. The version qualifier (Langflow 1.11.x) and enablement note are helpful, but an agent still doesn't know the response structure or failure modes.

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% for the single flow_id parameter, so the baseline is 3. The description adds only contextual framing (per-flow scope, Langflow 1.11.x) and no additional syntax or format detail beyond what the schema already states.

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 names a specific verb and resource (get the A2A agent card for a flow) and even identifies the underlying endpoint ('.well-known/agent-card.json'), so it is unambiguous what is returned. It does not explicitly contrast itself with nearby siblings like list_a2a_agents or invoke_a2a_jsonrpc, but the resource is distinct enough to route correctly.

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?

'Requires server-side A2A enablement' gives a real precondition that tells the agent when this call will succeed, which is more than most definitions offer. However, it names no alternative tool and does not say when to prefer this over list_a2a_agents or when the card lookup is warranted, leaving usage largely implied.

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