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 Prevents acting on outdated information.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 (7 months ago)
Last package publish: Apr 2, 2026 (7 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 Registry github-graphql

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Cite this page

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