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fix mcp tool names that are long or have invalid characters (based on 400 error) (#602)

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This commit is contained in:
Olcan
2025-05-29 16:13:11 -07:00
committed by GitHub
parent 2db5d83023
commit fe049c286f
1 changed files with 16 additions and 3 deletions
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19
packages/server/src/tools/mcp-client.ts
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@@ -116,12 +116,25 @@ async function connectAndDiscover(
};
removeSchemaProps(tool.inputSchema);
// if there are multiple MCP servers, prefix tool name with mcpServerName to avoid collisions
let toolNameForModel = tool.name;
if (Object.keys(mcpServers).length > 1) {
toolNameForModel = mcpServerName + '__' + toolNameForModel;
}
// replace invalid characters (based on 400 error message) with underscores
toolNameForModel = toolNameForModel.replace(/[^a-zA-Z0-9_.-]/g, '_');
// if longer than 63 characters, replace middle with '___'
// note 400 error message says max length is 64, but actual limit seems to be 63
if (toolNameForModel.length > 63) {
toolNameForModel =
toolNameForModel.slice(0, 28) + '___' + toolNameForModel.slice(-32);
}
toolRegistry.registerTool(
new DiscoveredMCPTool(
mcpClient,
Object.keys(mcpServers).length > 1
? mcpServerName + '__' + tool.name
: tool.name,
toolNameForModel,
tool.description ?? '',
tool.inputSchema,
tool.name,