validate_yaml_content
Validate YAML content without saving. Returns parsed result or error.
This record as markdown: /tools/fistacho-ha-nexus-agent/validate-yaml-content.md
What validate_yaml_content does on Ha Nexus Agent
AI agents call validate_yaml_content to retrieve information from Ha Nexus Agent without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why validate_yaml_content is rated Low
This tool performs syntax validation and parsing of YAML content, returning either the parsed structure or validation errors. It does not create, modify, delete, or execute any operations—it only analyzes and reports on the input provided. The absence of persistence ('without saving') confirms no data is altered or committed. This is a pure read/query operation with minimal risk.
From the tool's definition Tool name and description: 'Validate YAML content without saving. Returns parsed result or error.' The explicit 'without saving' clause and 'returns parsed result or error' indicates this is a read-only validation operation with no side effects.
Attacks that exploit this kind of access
The rule that runs validate_yaml_content safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Ha Nexus Agent, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For validate_yaml_content, this is the rule to start with:
validate_yaml_content is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Ha Nexus Agent, apply this rule, and every validate_yaml_content call is checked against it from then on.
Questions about validate_yaml_content
Validate YAML content without saving. Returns parsed result or error. It is categorised as a Read tool in the Ha Nexus Agent MCP Server, which means it retrieves data without modifying state.
Register the Ha Nexus Agent MCP server in PolicyLayer and add a rule for validate_yaml_content: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Ha Nexus Agent. Nothing to install.
validate_yaml_content is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the validate_yaml_content rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for validate_yaml_content. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
validate_yaml_content is provided by the Ha Nexus Agent MCP server (fistacho/ha-nexus-agent). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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