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alpernae

HackerOne MCP Server

by alpernae

h1_list_programs

List HackerOne programs to discover bug bounty targets and review each program's scope for eligible vulnerabilities.

Instructions

List available programs.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
page_sizeNo
page_numberNo
Behavior1/5

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

With no annotations provided, the description carries the full burden of behavioral disclosure, but it only states the action. It does not mention pagination, authentication needs, rate limits, result ordering, or whether the list is complete or filtered, which are critical for correct usage.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, concise sentence with no redundant words, earning a high score for conciseness. However, its extreme brevity sacrifices necessary detail, so it is not outstanding.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the pagination parameters and the absence of an output schema and annotations, the description is incomplete. It does not explain what 'available programs' means (e.g., accessible to the user, active programs), how pagination works, or what the response contains, leaving significant gaps for an agent.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters1/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 0%, and the description provides no information about the page_size and page_number parameters. The input schema only gives names and constraints, but the description adds no semantic context, leaving the agent to infer the meaning.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the verb 'List' targeting 'programs', which indicates the core operation. It is distinguishable from sibling tools like h1_get_program that target a single program, though it does not explicitly make that contrast.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

There is no guidance on when to use this tool versus alternatives. The description simply states 'List available programs' with no mention of use cases, prerequisites, or limitations, leaving the agent without context for selection.

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

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