pay-with-x402Before calling any Vybe endpoint without an API key (e.g. AI agent, throwaway script, premium-only path), use this to access the same endpoint via x402 pay-per-call USDC on Solana.
| Name | Required | Description | Default |
|---|---|---|---|
No arguments | |||
Changes observed during successful MCP inspections. Dates show when Glama detected each change.
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations provide readOnlyHint=true, which already declares safety. The description adds that it uses 'x402 pay-per-call USDC on Solana' but does not explain the actual behavior: Does it return a payment link? Does it redirect to a wallet? Does it require user interaction? Does it charge immediately? Without this, an agent cannot predict what happens after calling this tool. The description does not contradict the read-only hint, but it fails to disclose the operational flow, which is a significant gap for a no-parameter tool with no output schema.
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 a single, front-loaded sentence that immediately states the primary use case and the alternative condition. Every word earns its place—no fluff, no repetition. It efficiently communicates when and why to use the tool.
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 no inputs and an output schema is absent, the description should at least hint at what the agent receives or what happens next. It explains the 'when' but not the 'what does it do' beyond 'access the endpoint.' This leaves the agent uncertain about how to integrate its result. The complexity is low, but the description is incomplete for an agent that needs to chain this with a downstream request.
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 tool has zero parameters, so the schema is trivially complete. Per the rubric, a tool with no parameters gets a baseline of 4. The description adds no parameter information because there is none to add, which is appropriate. No deduction is needed.
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 that the tool is for accessing Vybe endpoints without an API key via x402 pay-per-call USDC on Solana. It names a specific action ('use this to access the same endpoint') and a resource ('Vybe endpoint'), which is distinct from the sibling execute/get/list/search tools that focus on direct endpoint operations. However, it doesn't explicitly say what the tool returns or how it differs from actually calling the endpoint, so it's not a perfect 5.
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 tells the agent when to use this tool: 'Before calling any Vybe endpoint without an API key' and gives examples of scenarios (AI agent, throwaway script, premium-only path). It also implies the alternative—when an API key is available, you don't use this tool. This is a clear usage directive with no ambiguity, and it references the sibling tools by implication (the endpoint-calling tools).
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Add one secure layer between your agents and this server.
Each tool has a clear and distinct role: discovery (search-endpoints), enumeration (list-endpoints), detail lookup (get-endpoint), execution (execute-request), and payment handling (pay-with-x402). No two tools overlap in purpose; even list and search serve different discovery workflows.
All tool names follow a consistent verb-object pattern with hyphens (execute-request, get-endpoint, list-endpoints, pay-with-x402, search-endpoints). The naming is uniform, predictable, and immediately conveys the action and target.
With 5 tools, the set is well-scoped for an API client wrapper. It covers discovery, inspection, execution, and payment without unnecessary bloat, striking an ideal balance between power and simplicity.
The tools form a complete lifecycle for interacting with the Vybe API: discover endpoints, get details, execute requests, and handle payment for keyless access. No obvious gaps exist for the stated purpose of a pay-per-call Solana data API.