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Investec OpenAPI MCP Server

Investec OpenAPI MCP Server

by jonelgithub
OverviewSchemaSourceRelated ServersDiscussionsAdmin
TypeScript
Remote

investec_card_update_env_vars

Saves key-value environment variables for a card's programmable code to customize its behavior.

Instructions

Save environment variables (key-value strings) for a card's programmable code.

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": {
      "cardKey": "<cardKey>",
      "variables": "<variables>"
    },
    "name": "investec_card_update_env_vars"
  }
}

Input Schema

NameRequiredDescriptionDefault
cardKeyYesThe unique key identifying the card
variablesYesKey-value dictionary of environment variables

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv1.0.0

TDQS

B3.1/5.0
Behavior2/5

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

No annotations present, so description carries full burden. While 'Save' implies mutation, it does not disclose whether variables are overwritten or appended, or specify authorization needs. Critical behavioral details are missing.

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

Conciseness4/5

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

Single sentence, 10 words, efficient and to the point. Could be slightly more structured with additional vital info, but not verbose.

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?

No output schema. The description fails to explain whether this is an update or full replacement of variables, and lacks side-effect information. For a mutation tool, this is insufficient.

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?

Schema coverage is 100% and both parameters have descriptions. The description adds 'for a card's programmable code' providing context, but does not add further syntax or constraints beyond the schema.

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

Purpose5/5

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

Description clearly states the verb 'Save' and resource 'environment variables' for a card's programmable code, distinguishing it from sibling tools like investec_card_get_env_vars which retrieve variables.

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?

No guidance on when to use this tool vs alternatives like investec_card_get_env_vars or investec_card_update_code. No context about prerequisites such as the card needing to be programmable.

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

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