* Add gen_ai.embeddings.dimension.count tag

* Add gen_ai.tool.call.arguments/result tags

* Add gen_ai.tool.definitions tag

EquivalenceEvaluator was specifying MaxOutputTokens = 1 since its prompt instructs the LLM to produce a response (score) that is a single digit (between 1 and 5).

Turns out that while this works for most models (including the OpenAI models that were used to test the prompt), some models require more than one token for this. For example, looks like Claude requires two tokens for this - see #6814).

This PR bumps the MaxOutputTokens to 5 to address the above issue.

Fixes #6814

… for uknown event sources (#6821)

* Fix KeyNotFoundException on HttpRequestLatencyListener.OnEventWritten for unknown event sources

* Update test/Libraries/Microsoft.Extensions.Http.Diagnostics.Tests/Latency/Internal/HttpRequestLatencyListenerTest.cs

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

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Co-authored-by: Darius Letterman <dcletterman@gmail.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

…#6818)

* Add project name normalization to match aspire's code generator for --aspire projects. Add execution tests for the fix.

* Address PR feedback: Test combine all available providers with aspire flag. More test cases coverage.

* Add an [EnvironmentVariableSkipCondition] attribute for conditional tests. Make the Aspire project name theory conditional.

* Regex logic and _Web append into one step. Rename test skip for clarity.

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Co-authored-by: Jeff Handley <jeffhandley@users.noreply.github.com>

Following the same pattern as elsewhere in M.E.AI, this enables a consumer to reach through layers of delegating tools to grab information from inner ones, such as whether they were marked as requiring approval.

1. Setting AllowMultipleToolCalls if there aren't any tools results in failure. Fix it to only set the property if tools have been added.
2. The chat completion service fails if a participant name containing anything other than a constrained set of characters are included. Fix it with a sanitized value.

* Disable really noisy analyzers, part 1

These are super annoying and add basically zero value.

…#6823)

* Initial plan

* Update .NET 9 RC 1 references to stable 9.0.0 in global.json

Co-authored-by: stephentoub <2642209+stephentoub@users.noreply.github.com>

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Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: stephentoub <2642209+stephentoub@users.noreply.github.com>

…gEnricher (#6783)