Rendben

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

Annotations already indicate a non-read-only, non-destructive, idempotent operation. The description adds valuable behavioral context: 'short-lived', 'does not move funds', and the auth requirement. This goes beyond the annotations and clarifies the nature of the operation, though it could mention more about the lifecycle (e.g., expiration, subsequent steps).

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?

The description is two sentences, front-loaded with the main action, and each sentence adds necessary information. There is no fluff, and the critical details (purpose, auth, behavioral note) are presented efficiently.

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?

Given the tool has 5 parameters (3 required) and no output schema, the description covers purpose, auth, and a key behavioral note. However, it does not mention what the response contains (e.g., payment intent ID, status), which would be helpful for an agent. The description is adequate but lacks this completeness for a tool without an output schema.

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 baseline is 3. The description does not add any additional meaning to the parameters beyond what the schema already provides. It mentions 'merchant product' in the purpose, but that does not specifically enhance parameter understanding.

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 clearly states the verb 'create', the resource 'payment intent', and provides specifics: 'short-lived', 'one-time', 'USDC', 'for a merchant product'. This distinguishes it from siblings like rendben_prepare_usdc_payment or rendben_prepare_checkout_payment, which are likely different stages of the payment flow.

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 implies the tool is used to create a payment intent for a merchant product and mentions the requirement of a read-write API key. However, it does not explicitly compare with sibling tools or provide guidance on when to use this one versus alternatives (e.g., rendben_prepare_usdc_payment). The usage context is clear but not fully explicit.

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

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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, signaling a safe read operation. The description adds specific behavioral assurance: 'This never returns the customer email, merchant API key or any wallet secret.' This is valuable extra context about data privacy, justifying a score above baseline.

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 sentences, front-loaded with purpose and followed by a critical safety disclosure. Every sentence adds value with no redundancy or fluff.

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?

Given the tool's simplicity (2 parameters, no output schema), the description adequately covers what the tool does and its data safety properties. It mentions 'receipt data' as a return element, which is helpful despite no formal output schema. The openWorldHint annotation suggests flexibility in return structure, so completeness is reasonable.

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%, and both parameters are well-described in the schema (e.g., 'Opaque pi_ payment intent ID.'). The description mentions 'opaque payment capability' but does not add new semantic meaning beyond what the schema already provides. Baseline 3 is appropriate.

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 clearly states the tool's purpose: 'Read payer-safe payment status and receipt data using the opaque payment capability.' It uses a specific verb ('Read') and resource ('payment status and receipt data'), and the sibling tools (e.g., rendben_get_subscription_status, rendben_prepare_*) are clearly different in scope, so the tool is well-distinguished.

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 provides no guidance on when to use this tool versus its siblings. It does not mention alternatives, prerequisites, or exclusions. The user must infer from the name and context that it is for checking payment status, but explicit instructions are missing.

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

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

Annotations already declare readOnlyHint=true and destructiveHint=false, so safety is clear. Description adds that it returns 'payer-safe' status, implying data is masked/untrustworthy—useful beyond annotations. No mention of rate limits or failure behavior.

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?

Single sentence, front-loaded with 'Read' purpose. No fluff. Could slightly improve by adding sibling differentiation in same sentence.

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 simple 1-param read tool with good annotations and 100% schema coverage, description provides necessary info. Lacks mention of no output schema, but that's fine per rules. Minor gap: doesn't clarify what 'payer-safe' means for agent.

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?

Only parameter is subscriptionId with 100% schema coverage, so schema does most work. Description adds that it's 'opaque sub_ subscription authorization ID returned by Rendben', reinforcing schema context. Baseline 3 is correct.

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?

Clearly states it reads a subscription authorization status after transaction submission. Verb is 'Read' and resource is specified ('opaque subscription authorization'). Differentiates from siblings in that it's post-transaction, but doesn't explicitly contrast with get_payment_status.

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?

Implies usage is after a transaction is submitted, but no explicit when-to-use vs. when-not-to-use, nor guidance on alternatives like get_payment_status. Context signals show siblings are payment-oriented, but description doesn't leverage that.

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

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

Annotations already provide strong behavioral hints: readOnlyHint=true, idempotentHint=true, destructiveHint=false, openWorldHint=true. The description adds value by specifying exactly what data is resolved (merchant, product, USDC amount, billing interval), which is not in the annotations. It does not describe error behaviors or URL format validation, but given the strong annotation coverage, this is a minor 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?

The description is extremely concise—two sentences that front-load the core action and then provide usage context. Every sentence earns its place: the first defines the function, the second tells when to use it. No wasted words.

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?

Given the tool has only one parameter, no output schema, and strong annotations, the description is commendably complete. It clarifies the tool's purpose, what it returns (merchant, product, USDC amount, billing interval), and when it should be called. The lack of an output schema is compensated by describing the output explicitly. For a simple inspection tool, this is fully adequate.

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% since there is only one parameter ('checkoutUrl'), and the schema already describes it as a 'Public merchant checkout URL on a *.rendben.com subdomain.' The description does not add additional parameter meaning beyond the schema. Baseline is 3, but the description reinforces the parameter's role by explaining it's a 'public Rendben checkout URL,' adding slight context about it being from a public source, justifying a 4.

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 clearly states the tool resolves a public Rendben checkout URL into specific fields: merchant, product, USDC amount, and billing interval. It uses a specific verb ('Resolve') and resource ('checkout URL'), making the purpose unambiguous. The tool is easily distinguished from siblings like 'rendben_prepare_checkout_payment' which involves preparing or signing payments.

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 explicitly states when to call this tool: 'before preparing or signing a payment.' This provides clear guidance that it's a prerequisite step. It implies that this tool should be used before siblings like 'rendben_prepare_checkout_payment' or 'rendben_prepare_usdc_payment', which is valuable workflow context.

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

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

Annotations already indicate readOnlyHint=false and openWorldHint=true, so the tool has write side effects. The description adds that it does not sign or submit, but fails to clarify what side effects actually occur (e.g., storing a pending authorization, creating a record). Given the openWorldHint, more disclosure is needed.

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?

The description consists of two clear sentences: the first stating the core purpose and required inputs, the second clarifying what the tool does not do. There is no wasted text, though a structured format might improve scanability.

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?

The tool lacks an output schema, yet the description does not explain what the tool returns or the next steps after preparation. With siblings that have overlapping names (rendben_prepare_usdc_payment), additional context is needed to distinguish usage. The open-world hint also requires more behavioral explanation.

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?

The schema covers all four parameters with full description coverage (100%). The description adds meaningful context by stating that maximumAmountUsdc caps each recurring charge for subscriptions, providing value beyond the schema. Other parameters are adequately explained in 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?

The description clearly states the tool prepares an unsigned one-time payment or recurring subscription authorization from a public Rendben checkout URL, using a specific verb and resource. However, it does not differentiate from the sibling rendben_prepare_usdc_payment which appears similar in scope.

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 implies usage when a public checkout URL is available and preparation is needed, and explicitly states that signing/submitting is not part of this step. However, it provides no guidance on when to use this tool versus other siblings like rendben_create_payment_intent or rendben_prepare_usdc_payment.

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

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

Annotations already mark the tool as non-readOnly, idempotent, and non-destructive. The description adds valuable context: the result is an unsigned transaction that must be reviewed and signed locally, implying no on-chain submission occurs here. No contradiction with annotations.

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?

Three focused sentences: purpose, requirements, safety warning, and outcome. No fluff, front-loaded with the core action, and every sentence adds value.

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?

The description covers the tool's purpose and key constraints, but given the absence of an output schema, it only vaguely hints at the result ('must be reviewed and signed locally'). It omits the output format (e.g., base64 transaction bytes) and fails to connect this to a follow-up submission step, leaving the agent with incomplete workflow context.

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%, so each parameter is already documented. The description summarizes three of the four parameters in plain language ('payer token', 'wallet public address', 'maximum spend') but does not add new meaning or constraints beyond what the schema provides. Baseline of 3 is appropriate.

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?

Clearly states it prepares an unsigned Solana mainnet transaction for a payment capability. The verb 'prepare' and resource 'unsigned transaction' are specific. However, it does not distinguish from the sibling 'rendben_prepare_checkout_payment', which likely serves a similar purpose for a different payment method.

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?

Provides requirements (payer token, wallet address, maximum spend) and a critical safety warning (never provide seed phrase/private key). But it lacks explicit guidance on when to use this tool over alternatives like 'rendben_prepare_checkout_payment', and does not mention prerequisites or postconditions.

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