nango-mcp-server

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download_provider_file

Download provider files through Nango Proxy and stream them as protected MCP binary resources using your connection credentials.

Instructions

Stream a provider GET response into a protected MCP binary resource.

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": {
      "environment": "<environment>",
      "providerConfigKey": "<providerConfigKey>",
      "connectionId": "<connectionId>",
      "path": "<path>"
    },
    "name": "download_provider_file"
  }
}

Input Schema

Name	Required	Description	Default
`path`	Yes
`query`	No
`headers`	No
`environment`	Yes
`connectionId`	Yes
`suggestedName`	No
`baseUrlOverride`	No
`providerConfigKey`	Yes

Schema Changelog

Changes observed during successful MCP inspections.

Changed4 schema fields changedv2.0.0Aug 29, 2026
- removedInput schema / properties / baseUrlOverride / default
```
Removed value: -null
```
- removedInput schema / properties / headers / default
```
Removed value: -null
```
- removedInput schema / properties / query / default
```
Removed value: -null
```
- removedInput schema / properties / suggestedName / default
```
Removed value: -null
```
Addedv1.0.0Aug 25, 2026

TDQS

C2.7/5.0

Behavior2/5

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

With no annotations, the description carries the full behavioral burden. It does disclose that the tool streams a GET response and creates or targets a protected MCP binary resource, which is useful. However, it omits important behavior such as whether a resource is created or overwritten, how the binary resource is accessed afterward, what errors can occur, and what the return value represents.

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 a single, direct sentence with no filler or repetition. It front-loads the core behavior and the destination, so it earns its place despite being short.

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?

For an 8-parameter, no-annotation, no-output-schema tool in a crowded sibling set, this description is too thin. An agent cannot determine required connection/auth context, how to set the file name, how query/headers interact with the GET request, or what the resulting MCP resource looks like.

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

Parameters1/5

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

The schema has 8 parameters and 0% description coverage, and the tool description does not explain environment, providerConfigKey, connectionId, path, query, headers, suggestedName, or baseUrlOverride. The phrase 'provider GET response' only weakly hints at providerConfigKey and path, leaving nearly all parameter semantics undocumented.

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 names a specific action ('Stream a provider GET response') and a specific target ('protected MCP binary resource'), so an agent can tell this is a download-style operation. It does not explicitly contrast it with sibling tools like proxy_request, but the 'into a protected MCP binary resource' phrase gives enough differentiation to avoid immediate confusion.

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?

There is no guidance on when to use this tool versus alternatives such as proxy_request or query_response_artifact. The description states what it does but not the conditions that make it the right choice, so an agent gets no help with tool selection from the sibling set.

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