Unofficial PubChem MCP Server

assess_environmental_fate

Analyze chemical biodegradation and bioaccumulation to evaluate environmental persistence and ecological impact using PubChem data.

Instructions

Assess environmental fate including biodegradation and bioaccumulation

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "cid": "<cid>"
    },
    "name": "assess_environmental_fate"
  }
}

Input Schema

Name	Required	Description	Default
`cid`	Yes	PubChem Compound ID (CID)

Implementation Reference

src/index.ts:1187-1189 (handler)

The handler function that executes the tool logic for 'assess_environmental_fate'. Currently a placeholder implementation returning a not-implemented message.

private async handleAssessEnvironmentalFate(args: any) {
  return { content: [{ type: 'text', text: JSON.stringify({ message: 'Environmental fate assessment not yet implemented', args }, null, 2) }] };
}

src/index.ts:796-797 (registration)
Dispatch case in the main request handler that routes execution to the specific tool handler.
```
case 'assess_environmental_fate':
  return await this.handleAssessEnvironmentalFate(args);
```

src/index.ts:661-671 (schema)

Tool registration object containing the name, description, and input schema definition.

{
  name: 'assess_environmental_fate',
  description: 'Assess environmental fate including biodegradation and bioaccumulation',
  inputSchema: {
    type: 'object',
    properties: {
      cid: { type: ['number', 'string'], description: 'PubChem Compound ID (CID)' },
    },
    required: ['cid'],
  },
},

src/index.ts:661-671 (registration)

Registration of the tool in the tools list provided to the MCP server.

{
  name: 'assess_environmental_fate',
  description: 'Assess environmental fate including biodegradation and bioaccumulation',
  inputSchema: {
    type: 'object',
    properties: {
      cid: { type: ['number', 'string'], description: 'PubChem Compound ID (CID)' },
    },
    required: ['cid'],
  },
},

Schema Changelog

Changes observed during successful MCP inspections.

First observedAug 15, 2025

TDQS

C2.9/5.0

Behavior2/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations are provided, so the description carries the full burden of behavioral disclosure. It states the tool assesses environmental fate but doesn't describe what the assessment entails (e.g., returns predictions, scores, or detailed reports), whether it's a read-only operation, potential limitations, or error conditions. For a tool with no annotation coverage, this leaves significant gaps in understanding its behavior.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is extremely concise—a single sentence that directly states the tool's purpose without unnecessary words. It's front-loaded with the core action and resource, making it easy to parse. Every word earns its place by specifying the assessment focus ('environmental fate') and key components ('biodegradation and bioaccumulation').

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the complexity of environmental fate assessment and the lack of annotations and output schema, the description is incomplete. It doesn't explain what the tool returns (e.g., scores, predictions, or detailed analyses), potential dependencies, or how it differs from related tools. For a tool with no structured output information, the description should provide more context to guide effective use.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The input schema has 100% description coverage, with the 'cid' parameter clearly documented as 'PubChem Compound ID (CID).' The description doesn't add any parameter-specific information beyond what the schema provides, such as format examples or constraints. However, with high schema coverage, the baseline score of 3 is appropriate, as the schema adequately handles parameter documentation.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool's purpose: 'Assess environmental fate including biodegradation and bioaccumulation.' It specifies the action ('assess') and the resource ('environmental fate'), and distinguishes it from siblings by focusing on environmental properties rather than molecular complexity, stereochemistry, drug-likeness, or other chemical analyses. However, it doesn't explicitly name the resource being assessed (e.g., 'compound' or 'chemical'), which prevents a perfect score.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description provides no guidance on when to use this tool versus alternatives. It doesn't mention prerequisites, context for environmental fate assessment, or differentiate from similar tools like 'get_safety_data' or 'get_toxicity_info' that might overlap with environmental concerns. Without any usage context, the agent must infer when this tool is appropriate.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.