# geomech_horizontal_stress

A read tool on the pyResToolbox MCP Server MCP server.

Agent View of the PolicyLayer registry record for `geomech_horizontal_stress`. HTML page: https://policylayer.com/tools/gabrielserrao-pyrestoolbox-mcp/geomech-horizontal-stress

## Facts

- Tool: `geomech_horizontal_stress`
- Server: pyResToolbox MCP Server (`gabrielserrao/pyrestoolbox-mcp`) — https://policylayer.com/tools/gabrielserrao-pyrestoolbox-mcp.md
- Homepage: https://github.com/gabrielserrao/pyrestoolbox-mcp
- 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": "geomech_horizontal_stress",
    "arguments": {}
  }
}
```

## Why geomech_horizontal_stress is rated Low

The tool name implies a calculation/estimation of horizontal stress values, which is a read/compute operation with no apparent side effects. The description is empty, which lowers confidence. Based on the server context of performing engineering calculations and the naming pattern of sibling tools (arps_rate, arps_cumulative, etc., which are all computation tools), this is most likely a read-only calculation.

From the tool's own definition: "Tool name 'geomech_horizontal_stress' suggests a geomechanics calculation (horizontal stress estimation), which is consistent with the server's petroleum engineering calculation theme (PVT analysis, well performance modeling, reservoir simulation support)."

## Use case

AI agents call geomech_horizontal_stress to retrieve information from pyResToolbox MCP Server 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 pyResToolbox MCP Server:

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

## Other tools on pyResToolbox MCP Server (107)

- `arps_rate` — Execute — https://policylayer.com/tools/gabrielserrao-pyrestoolbox-mcp/arps-rate.md
- `decline_forecast` — Execute — https://policylayer.com/tools/gabrielserrao-pyrestoolbox-mcp/decline-forecast.md
- `duong_rate` — Execute — https://policylayer.com/tools/gabrielserrao-pyrestoolbox-mcp/duong-rate.md
- `fit_decline` — Execute — https://policylayer.com/tools/gabrielserrao-pyrestoolbox-mcp/fit-decline.md
- `fit_decline_cumulative` — Execute — https://policylayer.com/tools/gabrielserrao-pyrestoolbox-mcp/fit-decline-cumulative.md
- `fit_relative_permeability` — Execute — https://policylayer.com/tools/gabrielserrao-pyrestoolbox-mcp/fit-relative-permeability.md
- `flowing_bhp` — Execute — https://policylayer.com/tools/gabrielserrao-pyrestoolbox-mcp/flowing-bhp.md
- `gas_pseudopressure` — Execute — https://policylayer.com/tools/gabrielserrao-pyrestoolbox-mcp/gas-pseudopressure.md
- `gas_rate_radial` — Execute — https://policylayer.com/tools/gabrielserrao-pyrestoolbox-mcp/gas-rate-radial.md
- `geomech_breakout_stress_inversion` — Execute — https://policylayer.com/tools/gabrielserrao-pyrestoolbox-mcp/geomech-breakout-stress-inversion.md
- `geomech_critical_mud_weight_collapse` — Execute — https://policylayer.com/tools/gabrielserrao-pyrestoolbox-mcp/geomech-critical-mud-weight-collapse.md
- `geomech_fault_stability` — Execute — https://policylayer.com/tools/gabrielserrao-pyrestoolbox-mcp/geomech-fault-stability.md
- `geomech_hydraulic_fracture_width` — Execute — https://policylayer.com/tools/gabrielserrao-pyrestoolbox-mcp/geomech-hydraulic-fracture-width.md
- `geomech_reservoir_compaction` — Execute — https://policylayer.com/tools/gabrielserrao-pyrestoolbox-mcp/geomech-reservoir-compaction.md
- `geomech_sand_production` — Execute — https://policylayer.com/tools/gabrielserrao-pyrestoolbox-mcp/geomech-sand-production.md
- `oil_material_balance` — Execute — https://policylayer.com/tools/gabrielserrao-pyrestoolbox-mcp/oil-material-balance.md
- `oil_rate_radial` — Execute — https://policylayer.com/tools/gabrielserrao-pyrestoolbox-mcp/oil-rate-radial.md
- `operating_point` — Execute — https://policylayer.com/tools/gabrielserrao-pyrestoolbox-mcp/operating-point.md
- `parameter_sweep` — Execute — https://policylayer.com/tools/gabrielserrao-pyrestoolbox-mcp/parameter-sweep.md
- `rachford_rice_flash` — Execute — https://policylayer.com/tools/gabrielserrao-pyrestoolbox-mcp/rachford-rice-flash.md
- `beta_to_lorenz` — Other — https://policylayer.com/tools/gabrielserrao-pyrestoolbox-mcp/beta-to-lorenz.md
- `create_oil_pvt` — Other — https://policylayer.com/tools/gabrielserrao-pyrestoolbox-mcp/create-oil-pvt.md
- `evaluate_jerauld` — Other — https://policylayer.com/tools/gabrielserrao-pyrestoolbox-mcp/evaluate-jerauld.md
- `evolved_gas_sg` — Other — https://policylayer.com/tools/gabrielserrao-pyrestoolbox-mcp/evolved-gas-sg.md
- `fit_ratio` — Other — https://policylayer.com/tools/gabrielserrao-pyrestoolbox-mcp/fit-ratio.md
- `gas_fws_sg` — Other — https://policylayer.com/tools/gabrielserrao-pyrestoolbox-mcp/gas-fws-sg.md
- `generate_aquifer_influence` — Other — https://policylayer.com/tools/gabrielserrao-pyrestoolbox-mcp/generate-aquifer-influence.md
- `generate_black_oil_table` — Other — https://policylayer.com/tools/gabrielserrao-pyrestoolbox-mcp/generate-black-oil-table.md
- `generate_black_oil_table_og` — Other — https://policylayer.com/tools/gabrielserrao-pyrestoolbox-mcp/generate-black-oil-table-og.md
- `generate_layer_distribution` — Other — https://policylayer.com/tools/gabrielserrao-pyrestoolbox-mcp/generate-layer-distribution.md
- …and 77 more: https://policylayer.com/tools/gabrielserrao-pyrestoolbox-mcp.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`

---

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