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Agent Output Guard

Validate and verify data from other agents before acting on it.

Connector by agenson-horrowitz · GitHub account verified by the MCP Registry

IndexedMITLocal (stdio)
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Install

Works with Claude Code, Codex, VS Code, Cursor, Windsurf, Claude Desktop. Read the repository before you give any tool access to your data.

npx agentmarket install connector/agenson-horrowitz-agent-output-guard

Asks which of your tools to add it to (Claude Code, Codex, Cursor, VS Code, Windsurf, Gemini CLI, Claude Desktop) and shows the change first. See https://agentmart.dev/cli.

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About

Validate and verify data from other agents before acting on it. Zero LLM costs.

Reviews

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Permissions

What this server can do and what it asks for, from its tool list and install config. Checked Oct 25, 2026.

Tools
5 read · 0 write · 0 deleteRead-only
Secrets
None asked for
Install scripts
Not scanned yet
Runs as
Node.js package

Tools by what they do 5

Read from the source code; the running server may list different tools.

Read 5 · Look things up without changing anything.

  • cross_reference_check
  • detect_hallucination_markers
  • output_consistency_score
  • validate_data_freshness
  • verify_json_schema

Tools (5)

Read from the source code; the running server may differ. Descriptions are the server’s own words; hidden characters are shown as [U+…].

  • cross_reference_check

    Compare data from multiple agents for consistency and detect discrepancies. Essential for multi-agent coordination. Returns consistency score and detailed comparison.

  • detect_hallucination_markers

    Scan agent output for common hallucination patterns, uncertainty markers, and fabrication indicators. Critical for multi-agent reliability. Returns detailed analysis and confidence score.

  • output_consistency_score

    Calculate overall consistency score for agent output including internal logic, format consistency, and reliability indicators. Returns comprehensive reliability assessment.

  • validate_data_freshness

    Check if data from another agent is recent and valid based on timestamps, staleness indicators, and expected update frequencies. Prevents acting on outdated information.

  • verify_json_schema

    Validate JSON data from another agent against expected schema. Essential for preventing malformed data propagation in multi-agent workflows. Returns validation status, errors, and confidence score.

Signals

Stars
0
Forks
1
Open issues
0
Weekly downloads
37
Last commit
Apr 5, 2026 (6 months ago)
Last release
Apr 2, 2026 (6 months ago)
Last package publish
Apr 2, 2026 (6 months ago)

From GitHub (fetched Oct 24, 2026) and the package registry.

Details

Registry name
io.github.agenson-horrowitz/agent-output-guard
Version
1.0.8
Auth
No auth
Packages
npm @agenson-horrowitz/agent-output-guard-mcp
License
MIT
Repository
github.com/agenson-tools/agent-output-guard-mcp
First seen
Oct 24, 2026
Last checked
Oct 25, 2026
Source
Official MCP Registrygithub-graphql

More from agenson-horrowitz

Cite this page

Agent Output Guard MCP server. Agent Mart. https://agentmart.dev/connectors/agenson-horrowitz-agent-output-guard (last updated 2026-10-25)