Support character-limit in list_sub tool #483
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xiangyan99
requested review from
JasonYeMSFT,
JonathanCrd,
KarishmaGhiya,
conniey,
Copilot,
msalaman,
tmeschter and
wbreza
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Pull Request Overview
This PR adds character-limit support to the Azure MCP Server's subscription list tool, allowing users to control response size through a new --character-limit parameter with a default limit of 10,000 characters. When the response exceeds the limit, subscriptions are automatically truncated with informative status messages.
Key changes:
- Added
--character-limitparameter to control response size with automatic truncation - Enhanced response messages to include character count and truncation status
- Added comprehensive test coverage for various character limit scenarios
Reviewed Changes
Copilot reviewed 5 out of 5 changed files in this pull request and generated 2 comments.
Show a summary per file
| File | Description |
|---|---|
CHANGELOG.md |
Documents the new character-limit parameter feature |
SubscriptionListCommandTests.cs |
Adds extensive test coverage for character limit functionality |
OptionDefinitions.cs |
Defines the new CharacterLimit option with 10,000 character default |
SubscriptionListOptions.cs |
Adds CharacterLimit property to subscription list options |
SubscriptionListCommand.cs |
Implements character limit logic with response truncation |
core/Azure.Mcp.Core/src/Areas/Subscription/Commands/SubscriptionListCommand.cs
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core/Azure.Mcp.Core/src/Areas/Subscription/Commands/SubscriptionListCommand.cs
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…o limit_sub_list
…o limit_sub_list
JasonYeMSFT
reviewed
Oct 13, 2025
| - Added `azmcp extension cli generate` command for generating Azure Cli commands based on user intent. [[#203](https://github.com/microsoft/mcp/issues/203)] | ||
| - Added `azmcp extension cli install` command for getting installation instructions for Azure CLI, Azure Developer CLI and Azure Functions Core Tools. [[#74](https://github.com/microsoft/mcp/issues/74)] | ||
| - Added `IsServerCommandInvoked` telemetry field indicating that the MCP tool call resulted in a command invocation. [[#751](https://github.com/microsoft/mcp/pull/751)] | ||
| - Added `--character-limit` parameter to `azmcp_subscription_list` command to control response size. This parameter allows users to limit the number of characters returned in the response, with automatic truncation and informative status messages when the limit is exceeded. Default limit is 10,000 characters. |
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What does this PR do?
[Provide a clear, concise description of the changes]Added character-limit switch in list_sub tool. If the response exceeds the limit, subscriptions are truncated.
#428
[Any additional context, screenshots, or information that helps reviewers]GitHub issue number?
[Link to the GitHub issue this PR addresses]Pre-merge Checklist
servers/Azure.Mcp.Server/CHANGELOG.mdand/orservers/Fabric.Mcp.Server/CHANGELOG.mdfor product changes (features, bug fixes, UI/UX, updated dependencies)servers/Azure.Mcp.Server/README.mdand/orservers/Fabric.Mcp.Server/README.mddocumentation/docs/azmcp-commands.mdand/or/docs/fabric-commands.mdToolDescriptionEvaluatorand obtained a score of0.4or more and a top 3 ranking for all related test prompts/docs/e2eTestPrompts.mdcrypto mining, spam, data exfiltration, etc.)/azp run mcp - pullrequest - liveto run Live Test Pipeline