search_pubmed
Search PubMed for biomedical literature. Find research articles, reviews, and clinical studies matching your search terms. Supports PubMed query syntax including MeSH terms, field tags, and boolean operators. Args: query: Search terms (e.g. 'diabetes prevention exercise', 'breast cancer[MeSH] AND immunotherapy', 'COVID-19 vaccine efficacy'). limit: Maximum results (default 20, max 100). sort: Sort order - 'relevance', 'date', or 'author' (default 'relevance').
sortlimitquery必填