The plugin validator cannot resolve the class from the dependent plugin

IntelliJ Platform Plugin Verifier
,
1

When I was writing the MCP extension plugin, I encountered the following problem:

My code:

import com.intellij.mcpserver.McpToolset
import com.intellij.mcpserver.annotations.McpDescription
import com.intellij.mcpserver.annotations.McpTool
import com.intellij.mcpserver.mcpFail
import com.intellij.mcpserver.util.resolveInProject

My build.gracle.kts:

dependencies {
    intellijPlatform {
        compileOnly(project(":openapi"))
        intellijIdeaUltimate(prop("platformVersion")) {
            useCache = true
        }
        bundledPlugins("com.intellij.mcpServer")
    }
}

When the plugin verified by 1.395, both local or on the Marketplace , it report :

#Invocation of unresolved method com.intellij.mcpserver.McpToolKt.mcpFail(String) : Void
        Method vanstudio.sequence.mcp.SdGeneratorToolset.generate_sequence_diagram$lambda$1(vanstudio.sequence.mcp.SdGeneratorToolset arg0, com.intellij.psi.PsiFile arg1, java.lang.String arg2) : com.intellij.psi.PsiElement contains an *invokestatic* instruction referencing an unresolved method com.intellij.mcpserver.McpToolKt.mcpFail(java.lang.String) : java.lang.Void. This can lead to **NoSuchMethodError** exception at runtime.
        Method vanstudio.sequence.mcp.SdGeneratorToolset.resolveProjectFilePath(java.lang.String arg0) : kotlin.Pair contains an *invokestatic* instruction referencing an unresolved method com.intellij.mcpserver.McpToolKt.mcpFail(java.lang.String) : java.lang.Void. This can lead to **NoSuchMethodError** exception at runtime.
        Method vanstudio.sequence.mcp.SdGeneratorToolset.generate_sequence_diagram$lambda$0(com.intellij.openapi.vfs.VirtualFile arg0) : com.intellij.openapi.editor.Document contains an *invokestatic* instruction referencing an unresolved method com.intellij.mcpserver.McpToolKt.mcpFail(java.lang.String) : java.lang.Void. This can lead to **NoSuchMethodError** exception at runtime.
        Method vanstudio.sequence.mcp.SdGeneratorToolset.generate_sequence_diagram(java.lang.String arg0, java.lang.String arg1, int arg2, kotlin.coroutines.Continuation arg3) : java.lang.Object contains an *invokestatic* instruction referencing an unresolved method com.intellij.mcpserver.McpToolKt.mcpFail(java.lang.String) : java.lang.Void. This can lead to **NoSuchMethodError** exception at runtime.

Why the com.intellij.mcpserver.McpToolKt.mcpFail(String) can not resolved by verifier cli, while it is at the same packate com.intellij.mcpserver.McpToolset？

2

From the Plugin Verifier perspective, it is hard to investigate what is going on.
What is the version of the Platform? Looks like the most recent MCP version has a slightly different API.

3

platform version 2025.2

4

McpToolset works but mcpFail doesn’t, why is that? They are in the same package after all.