bitpin_create_internal_withdrawal

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

No annotations are provided, so the description carries the full disclosure burden. It does add useful context (zero-fee, instant, "Requires authentication"), but for an irreversible money-movement mutation it omits whether OTP confirmation is needed (a sibling bitpin_verify_withdrawal_otp exists), whether the transfer can be cancelled or reversed, and what failure conditions look like.

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 short sentences, with the core action and its distinguishing traits front-loaded and the authentication caveat trailing. Nothing redundant.

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 three-required-parameter fund-transfer with no annotations and no output schema, the description covers purpose but not the operational picture: confirmation/OTP flow, expected result, and error behavior are all absent, so an agent cannot fully anticipate the call sequence.

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 100% and all three parameters are documented in-schema, so the baseline is 3. The description only reinforces that alternative_address is a BitPin-registered mobile or email; it adds no format, validation, or cross-parameter rules 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?

States a specific verb and resource ("cryptocurrency transfer") plus the distinguishing scope: internal, instant, zero-fee, and to another BitPin user via phone/email. That scope makes it self-evidently distinct from the on-chain and IRT withdrawal siblings without naming them.

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 adjectives "instant, zero-fee" and "another BitPin user" imply the when-to-use case (internal P2P transfers), but the description never explicitly routes the agent: it does not name bitpin_create_crypto_withdrawal or bitpin_create_irt_withdrawal as the alternatives for external/IRT withdrawals, nor state prerequisites such as wallets or limits.

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