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

Annotations mark this as non-read-only, non-destructive, non-idempotent, so the description must add context, which it partly does: connect takes a read-only credential validated by listing cards, and freeze_access requires a separate credential that can freeze cards and set limits. However, it says nothing about what disconnect or remove_freeze_access do to existing connected data, or whether these actions are reversible.

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?

It is a single dense run-on sentence packed with parentheticals, which makes it hard to scan; the action-to-meaning mapping would read far better as a short list. It is front-loaded on 'action list' but not on the highest-value information.

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?

An output schema exists, so return formatting needn't be explained, and all five action values are at least touched. But for a multi-action mutation tool with zero schema coverage, the description omits the effect semantics of disconnect/remove_freeze_access and the identity of the credential fields an agent must supply.

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 0%, so the description must compensate, and it largely does: it maps platform values to named providers and explains that 'fields' means a read-only credential for connect versus a separate freeze/limit credential for freeze_access. It still leaves the exact field keys and the purpose of fields for list/disconnect undocumented.

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 the resource (the card/banking platforms Veqen reads: Stripe Issuing, Ramp, Brex, Mercury) and enumerates the specific actions (list, connect, disconnect, freeze_access, remove_freeze_access). It does not explicitly differentiate itself from nearby siblings like connect_provider or agent_cards, but the purpose is unmistakable.

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?

It implies when each action applies by describing what list returns ('what each needs, and which are connected') and that connect credentials are verified by listing cards, but there is no explicit when-to-use vs. alternatives guidance (e.g., linking vs. agent_cards or connect_provider), and no stated prerequisites or ordering constraints.

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