# get_spans

Fetch recent agent spans, optionally filtered by session or run.

Agent View of the PolicyLayer registry record for `get_spans`. HTML page: https://policylayer.com/tools/sveritg-metis-ph/get-spans

## Facts

- Tool: `get_spans`
- Server: Metis Public Health (`sveritg/metis_ph`) — https://policylayer.com/tools/sveritg-metis-ph.md
- Homepage: https://github.com/SVerITG/Metis_PH
- Risk category: Read (Low risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Allowed

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_spans",
    "arguments": {}
  }
}
```

## Why get_spans is rated Low

This tool queries and retrieves telemetry or execution trace data (agent spans) from the system with optional filtering. It has no side effects, does not modify data, does not execute code, and does not delete anything. It is purely informational retrieval, fitting the 'Read' category.

From the tool's own definition: "Tool name is 'get_spans' and description states 'Fetch recent agent spans' — 'Fetch' is a read operation that retrieves data without modification."

## Use case

AI agents call get_spans to retrieve information from Metis Public Health without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

## Recommended policy (PolicyLayer)

Verdict: **Allowed**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Metis Public Health:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "get_spans": {}
  }
}
```

## Other tools on Metis Public Health (276)

- `archive_library_item` — Destructive — https://policylayer.com/tools/sveritg-metis-ph/archive-library-item.md
- `delete_data_trigger` — Destructive — https://policylayer.com/tools/sveritg-metis-ph/delete-data-trigger.md
- `delete_knowledge_database` — Destructive — https://policylayer.com/tools/sveritg-metis-ph/delete-knowledge-database.md
- `delete_task` — Destructive — https://policylayer.com/tools/sveritg-metis-ph/delete-task.md
- `remove_first_run_marker` — Destructive — https://policylayer.com/tools/sveritg-metis-ph/remove-first-run-marker.md
- `remove_library_item` — Destructive — https://policylayer.com/tools/sveritg-metis-ph/remove-library-item.md
- `remove_project` — Destructive — https://policylayer.com/tools/sveritg-metis-ph/remove-project.md
- `remove_tracked_file` — Destructive — https://policylayer.com/tools/sveritg-metis-ph/remove-tracked-file.md
- `reset_thinking_profile` — Destructive — https://policylayer.com/tools/sveritg-metis-ph/reset-thinking-profile.md
- `analyze_script` — Execute — https://policylayer.com/tools/sveritg-metis-ph/analyze-script.md
- `dhis2_query` — Execute — https://policylayer.com/tools/sveritg-metis-ph/dhis2-query.md
- `generate_profiling_script` — Execute — https://policylayer.com/tools/sveritg-metis-ph/generate-profiling-script.md
- `install_background_pack` — Execute — https://policylayer.com/tools/sveritg-metis-ph/install-background-pack.md
- `run_maintenance` — Execute — https://policylayer.com/tools/sveritg-metis-ph/run-maintenance.md
- `run_metis` — Execute — https://policylayer.com/tools/sveritg-metis-ph/run-metis.md
- `run_trigger_now` — Execute — https://policylayer.com/tools/sveritg-metis-ph/run-trigger-now.md
- `scaffold_script` — Execute — https://policylayer.com/tools/sveritg-metis-ph/scaffold-script.md
- `scan_project_scripts` — Execute — https://policylayer.com/tools/sveritg-metis-ph/scan-project-scripts.md
- `start_course_build` — Execute — https://policylayer.com/tools/sveritg-metis-ph/start-course-build.md
- `start_interest_interview` — Execute — https://policylayer.com/tools/sveritg-metis-ph/start-interest-interview.md
- `brainstorm_turn` — Other — https://policylayer.com/tools/sveritg-metis-ph/brainstorm-turn.md
- `end_span` — Other — https://policylayer.com/tools/sveritg-metis-ph/end-span.md
- `start_span` — Other — https://policylayer.com/tools/sveritg-metis-ph/start-span.md
- `aggregate_reflexions` — Read — https://policylayer.com/tools/sveritg-metis-ph/aggregate-reflexions.md
- `anonymize_text` — Read — https://policylayer.com/tools/sveritg-metis-ph/anonymize-text.md
- `ask_library` — Read — https://policylayer.com/tools/sveritg-metis-ph/ask-library.md
- `assemble_brainstorm_context` — Read — https://policylayer.com/tools/sveritg-metis-ph/assemble-brainstorm-context.md
- `audit_background_provenance` — Read — https://policylayer.com/tools/sveritg-metis-ph/audit-background-provenance.md
- `backup_db` — Read — https://policylayer.com/tools/sveritg-metis-ph/backup-db.md
- `check_data_safety` — Read — https://policylayer.com/tools/sveritg-metis-ph/check-data-safety.md
- …and 246 more: https://policylayer.com/tools/sveritg-metis-ph.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

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Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=sveritg-metis-ph · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/sveritg-metis-ph